Question

A hall has 4 windows, each 4 m wide and high,2 doors each 2.5 m tall and 2m wide,and 3 wall closests, each 2.5m tall and 1m wide.If a hall is 20m long, 18m wide, and 6m high, find the cost of painting it's wall at 38 per m²

Answer 1

Area of 4 windows=l*b*4=4*4*4=64m^2

Area of 2 doors=l*b*2=2.5*2*2=10m^2

Area of 3 wall closets=l*b*3=2.5*1*3=7.5m^2

Area of 4 walls of hall= 2(l+b)h

=2(20+18)6

=12*38

=456m^2

Area to be painted=456-(64+10+7.5)

=456-81.5. = 374.5m^2