the area of the four walls in a room is 120 m square the length of the twice the breadth if the height of the room is 4 m find the area of the floor
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Height =4m
Let breadth be x
Then length =2x
Area of 4 walls of room=120m^2
2 (l+b)h=120
2 (2x+x)×4=120
2×3x×4=120
3x×8=120
3x=15
x=5
Breadth=5m
Length =10m
Area of floor=l×b
= 10 × 5
= 50m^2
Let breadth be x
Then length =2x
Area of 4 walls of room=120m^2
2 (l+b)h=120
2 (2x+x)×4=120
2×3x×4=120
3x×8=120
3x=15
x=5
Breadth=5m
Length =10m
Area of floor=l×b
= 10 × 5
= 50m^2
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