Question

How much tin sheet is used to make a box measuring 80 cm by 80 cm by 80 cm ? What will it cost at the rate of rs300 per meter square

Answer 1

since the box is in cube shape
so here we will find total surface area of cube of side 80 cm or 0.8 m given
total surface area of cube = 6 x (side) ^2
                                         =6 x (0.8)^2
                                          = 6 x 0.64 = 3.84 sq m
if the rate at Rs. 300 sq per metre
Total cost of 3.84 sq m= 3.84 x 300 = Rs. 1152

Answer 2

area of box =6 side ^2
6×80 ×80
480 ×80 cm ^2
3840 cm^2

cost of 1cm^2 =300
cost of 3840cm ^2=300×3840
rupees 1152000
1152000/1000
115200 m^2