Question

The cost of carpenting a square room at Rs 125 per sq meter is Rs 40500. If the cost Rs 14400 to plaster the four walls at the rate of Rs 50 per sq meter , what is the height of the room?

Answer 1

area of floor= 40500/125

=324 sq. meter

Hence,

side of floor of room is √324=18m

Lateral surface area is 2 h(l+b) where h is height

L.S.A(lateral surface area)= 14400/50

= 288

Hence,

288=2h(18+18)

288/2=h*36

144=36h

144/36=h

4 m=height