Question

A room is 10 m long 6 m wide and 4.2 m high. It has one door of 2.5 m×1.5 m and one window of dimensions 1.5 m×1 m.Find the cost of whitewashing the walls at 2.50 per Sq.m.​

Answer 1

Step-by-step explanation:

area of 4 walls = 2×4.2(10+6)

=8.4x16

=134.4m square

area of door = 2.5x1.5

=3.75 m square

area of window = 1.5x1

=1.5m square

area to be whitewashed = 134.4-(3.75+1.5)

=134.4-5.25

=129.15m square

cost of whitewashing = 129.15×2.50

=rs 322.875

=rs 322.9