Question

10. The perimeter of one face of a cube is 20 cm.
Its total surface area is :
(a) 2400 cm?
(b) 150 cm
(c) 120 cm
(d) 96 cm?​

Answer 1

Answer:

B 150 cm^2

Step-by-step explanation:

ATQ;

4 x side = 20

=> side of the cube = 5 cm

T. S. A. = 6 x Side^2

= 6 x 25

= 150 cm^2

Answer 2

Answer:

Side of cube= 20/4 = 5cm

$T.S.A= 6x {}^{2} \\ \: \: \: \: \: \: \: \: \: \: = 6(5) {}^{2} \\ \: \: \: \: \: \: \: \: \: \: = 6 \times 25 \\ \: \: \: \: \: \: \: \: \: = 150cm^2$

Total surface area= 150 cm^2.