Question

A container of side. 3.5 m is to be painted both inside and outside . find the area to be painted and the total cost of painting it at th rate of rs.75 per square meter

Answer 1

T.S.A of cube = 6a​2
= 6 x 3.5 x 3.5 = 6 x 12.25= 73.5 m2
Since inside and outside = 73.5 x 2 = 147 m2
Rs 75 for 1 m2
For 147m2 = 147 x 75 = Rs 11025