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

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

An open box is made of wood 2 cm thick. Its internal length is 86 cm , breadth 46 cm and height is 38 cm. The cost of painting the outer surface of the box at Rs. 10 per m^(2) is :

The walls and ceiling of a room are to be plastered. The length, breadth and height of the room are 4.5m, 3m and 350cm, respectively. Find the cost of plastering at the rate of Rs. 8 per square metre.

The walls and ceiling of a room are to be plastered. The length, breadth and height of the room are 4.5m, 3m and 350cm, respectively. Find the cost of plastering at the rate of Rs. 8 per square metre.

A closed box made of wood of uniform thickness has length,breadth and height 12cm,10cm and 8cm respectively.If the thickness of the wood is 1cm, the inner surface area is (a) 264cm2 (b) 376cm2 (c) 456cm2 (d) 696cm2

The dome of a building is in the form of a hemisphere. Its radius is 63dm. Find the cost of painting it at the rate of Rs. 2 per sq.m.