Question

Practice Set 47
1. Find the total surface area of cubes having the following sides.
(i) 3 cm
(ii) 5 cm (iii) 7.2 m (iv) 6.8 m (v) 5.5 m​

Answer 1

Answer:

explained below

Step-by-step explanation:

total surface area of cube=6$x^{2}$ where x is measure of any side

so for

1) x= 3 cm

total surface area = 6*$3^{2}$=54 $cm^{2}$

2)x=5cm

total surface area= 6*$5^{2}$=150$cm^{2}$

3)x=7.2m

total surface area=6*$7.2^{2}$=311.04$m^{2}$

4)x=6.8m

total surface area =6*$6.8^{2}$=277.44$m^{2}$

5)x=5.5m

total surface area=6*$5.5^{2}$=181.5 $m^{2}$