Question

One side of a cubic box is 0.4 m. How much will it cost to paint the outer surface of the box at the rate of 50 rupees per sqm?

Answer 1

side = l = 0.4 m.

Total surface area of cube = 6 × (l)²
= 6 × (0.4)²
= 6 × 0.16
= 0.96 sqm

Cost of painting 1 sqm is 50 rupees.

∴ Cost of painting 0.96 sqm will be = 0.96 × 50 = 48 rupees

It will cost 48 rupees to paint the outer surface of the box.