A classroom is 7 m long 6 m broad and 35 m high Doors and windows occupy an area of 17 m2 What is th...

Question

A classroom is 7 m long 6 m broad and 35 m high Doors and windows occupy an area of 17 m2 What is the cost of white washing the walls at the rate of Rs 150 per m2

Accepted Answer

Given details are Dimensions of class room 7m 6m 35m Where Length 7m Breadth 6m Height 35m Area of four walls including doors windows 2 lh bh m2 2 735 635 91m2 Area of four walls without doors windows Area including doors windows area occupied by doors windows 91 17 74 m2 Then Cost for white washing 1m2 area of walls Rs 150 Total cost for white washing the walls 74 150 Rs 111

RD Sharma Solutions Class 8 Mathematics Solutions for Volume Surface Area Cuboid Cube Exercise 21.3 in Chapter 21 - Volume Surface Area Cuboid Cube