Question

An open box is made of wood 3 cm thick, its external length, breadth and height are 1.48 m, 1.16 m and 8.3 dm. Find the cost of painting the inner surface of Rs 50 per sq. metre.

Answer 1

The external dimensions of the wooden box,

Length

Breadthand height is

Thickness of the wood

We are asked to find the cost of painting

So, the internal dimensions of the box are,

Length

Breadth

Height

The internal surface area of the box,

We are given the rate of painting per square meter is

So the total cost of painting is,

The total cost of painting is .