Question

5. Find the perimeter of each figure :
12 m
(ü)
28 cm
Semicircle
7 cm
Rectangle
17 cm
6 m
Rectangle
Semicircle
Semicircle
(ii)
21 m
(u)
14 cm
2.1 m
21 m
0 2.1 m
21 cm
21 cm​

Answer 1

Answer:

The faces of a cube are squares.

Let the side of the square or the cube =a cm

Perimeter of the square =4a=32 cm →a=8 cm

Total surface area of a cube of edge a =6a

2

So, the total surface area of the cube of edge a =8 cm is 6(8)

2

=384cm

2