Question

A wall of dimensions 13 mx 7.5 m has a door of 2 mx 1 m and two windows of lm 75 cm.
i) Find the quantity of paint required to paint the wall if 1 litre of paint is enough
to whitewash 25 sq.m of area.
ii) Find the cost of paint required if 1 litre costs 3350.​

Answer 1

Answer: i) 3.76 litre

ii) 12596

Step-by-step explanation:

Area of wall= 13m X 7.5m =97.5 m^2

Area of door= 2m X 1m= 2m^2

Area of 2 windows= 2( 1m X 0.75m)= 1.5m^2

i) Area of wall excluding door and windows= 97.5 - 2 - 1.5= 94 m^2

therefore quantity of paint required for white wash= 94/25= 3.76 litre.

ii) cost of paint = 3.76 X 3350 = 12596