Question

The square room has volume 256 m cube if the cost of painting its four walls at rs 5 per metre square be rupees 640 find the height of the room​

Answer 1

Answer :

cost of Panting it's four wall =640/5

=128rs

L.S.A=128m^2

L.S.A=4*a^2

128=4*a^2

128/4=a^2

a=√32

a=4√2

cube has all sides are equal

hence, height is 3√2m