Question

A room is 22m long, 15m broad and 6m high. Find the area of its four walls and the cost of painting including doors and windows at the rate of Rs.12per m².

Answer 1

Given that:
Length (l) of room = 22m
Breadth (b) of room = 15m  &
Height (h) of room = 6m
L.S.A of room
= 2 x h x (l + b)
= 2 x 6 x (22 + 15)
= 2 x 6 x 37
= 444m²
∴ Area of its 4 walls = 44m²
Cost of painting the walls = 12per m2
i.e., for 1m2 = Rs.12
∴ For 444m²
= Rs.12 x 444
= Rs.5328.