The area of 4 walls of a room is 120m2. If the length of the room is twice its breadth and the height is 4 m, find the area of the floor.
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let breadth be x.
length of room =2x.
height=4m
area of four walls of a room=2 (l+b)h.
2 (2x+x)4.
2×3x×4.
24x.
ATQ
24x=120.
x=120/24=5
length=5m.
breadth=5×2=.20m.
and area of floor =l×b.
=20×5=100sq m.
length of room =2x.
height=4m
area of four walls of a room=2 (l+b)h.
2 (2x+x)4.
2×3x×4.
24x.
ATQ
24x=120.
x=120/24=5
length=5m.
breadth=5×2=.20m.
and area of floor =l×b.
=20×5=100sq m.
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