Question

Để tăng diện tích một hình chữ nhật lên 2 lần mà chiều rộng chỉ tăng thêm được 25%. Hỏi phải tăng chiều dài thêm bao nhiêu phần trăm ?
Trả lời: Phải tăng chiều dài thêm %.

                                                                Giải được có LIKE

Answer 1

Diên tích tăng gấp 2 lần có nghĩa diện tích mới bằng 200% diện tích cũ. 
Chiếu dài mới 100% + 25% = 125% chiều dài cũ. 
Nên Chiều rộng mới bằng : 200% : 125% = 160 % chiều rộng cũ 
Do đó Chiều rộng cũ phải tăng thêm: 160% - 100% = 60% 
Chúc bạn Zui ze nha.

Answer 2

 

chiều dài chứ

 

 

                                                  

Answer 3

dài tăng lên 60% .hi hi bài này cũng dễ đấy

Answer 4

tăng 60% bạn ạ

Answer 5

bạn trả lời kết quả đúng nhưng câu trả lời theo mình chưa chính xác mà:

Chiều rộng mới 100% + 25% = 125% chiều rộng cũ mà

Nên chiều dài mới 200% : 125% = 160% chiều dài cũ

Do vậy chiều dài phải tăng thêm là: 160% - 100% = 60%

Answer 6

S ban đầu = a x b     -> S tăng lên gấp 2 lần = a x b x 2

- Chiều rộng tăng thêm 25% = b x 125/100

- Đặt n là số phần trăm chiều rộng tăng lên -> Chiều rộng sau khi tăng là a x n.

- Ta có:                   S tăng = (a x n) x (b x 125/100) = a x b x 2

  Đổi chỗ các thừa số ta được  a x b x n x 125/100   = a x b x 2

                                                Hay :      n x 125/100 = 2

                                                                                n = 2 : 125/100 = 160/100

       Vậy Tỉ số phần trăm của chiều dài tăng them là  160/100 – 100/100 = 60/100

                Đáp số : 60%

Answer 7

Chiều dài tăng thêm 60 %,bài này mình làm rồi, đúng đấy

Answer 8

60% Là đúng 100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%

Answer 9

60% dung 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%

Answer 10

sai 100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

Answer 11

60% la cai chat

Answer 12

bạn ơi 60 phần trăm đúng đấy cô giáo mình chữa rồi

Answer 13

60% là đúng nhất đúng 100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%

Answer 14

bo may la dung nhat 9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999%

Answer 15

D	e
Q	ua
Ban	oi

Answer 16

Baonay de. Bamg 60% dung ko cac ban . Co giao cho bon minh lam bai nay rui. De nhu ko y ma. Cau hoc lop may ho Lan

Answer 17

Bai nay de . Co giao minh day roi bang 60%dung ko. Lan oi ban hoc lop may. De nhi. Lop minh lam ao ao. Chi 1 phut la xung

Answer 18

60% nha bạn

Answer 19

60% là đúng 100000000000000000000000000000000000000000000000000000000000000000000000%

Answer 20

60% nhé bạn

Answer 21

60% nha ban

Answer 22

tớ làm rùi tớ ra 60 %

Answer 23

60% quá đúng

1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%

Answer 24

Đúng 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 ...luôn!