The length of room is double it's breadth.its height is 3m . Area of four walls excluding a door of dimensions 4m*2m is 100m^2 . Find its volume
(Ans. 216m^3)
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Step-by-step explanation:
l=2b
h=3m
Area of 4 walls = 100+8=108m^2
108=2(l+b)h
108=(2b+b)×3
108÷6=3b
18=3b
b=18÷3
b=6m
l=2b
l=2×6
l=12m
volume=l×b×h=12×6×3=216m^2
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