Question

A room is 40 m long, 30 m broad and
10 m high. Find the cost of whitewashing
its four wall and ceiling at rupees 20 per sqm.​

Answer 1

Solution :-

___________

Dimensions of room => 40 m, 30 m, 10 m.

area of four walls => 2h ( l + b)

area of four walls + celling => 2*10 ( 40+30) + ( 40 * 30 )

area of four walls + celling => 1400 + 1200

area of four walls + celling => 2600 sqm

cost of white washing => 2600 sqm * 20

cost of white washing => 52000 rupees