Question

preeti is painting the wall and ceilings of a hall whose dimensions are 18m × 15m × 5m . from each can of paint 120 m square of area is painted . how many cans of paint she need to paint?

Answer 1

= l×b×h
= 18×15×5
= 1350
= 1350× 120
= 162000cm²

Answer 2

surface area of cuboid without lid=lb+2lh+2bh
=18*15+2*18*5+2*15*5
=270+180+150=600m^2
1 can=120m
for 600 m
can=600/120=5 cans
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