Question

A cubical box with lid has a length of 30 find the cost of panting the inside and outside of the box at the rate of 5.50rupees per m2

Answer 1

surface area of cube = 6a²

for inside and outside area = 2 ×6a²

=2×6×30²

=12×900 = 10800 m²

cost = 10800 × 5.50 =59400 rupees.