Question

a) chiều dài 15,6cm,chiều rộng 10cm, chiều cao 8cm

b) chiều dài 7/8m,chiều rộng 3/4m, chiều cao 1/2m.

Answer 1

a: \(S_{XQ}=\left(15.6+10\right)\cdot2\cdot8=409.6\left(cm^2\right)\)

\(S_{TP}=409.6+2\cdot15.6\cdot10=721.6\left(cm^2\right)\)

b: \(S_{XQ}=\left(\dfrac{7}{8}+\dfrac{3}{4}\right)\cdot2\cdot\dfrac{1}{2}=\dfrac{13}{8}\left(m^2\right)\)

\(S_{TP}=\dfrac{13}{8}+2\cdot\dfrac{7}{8}\cdot\dfrac{3}{4}=\dfrac{47}{16}\left(m^2\right)\)