the area of the four walls in a room is 120m2. The length is twice the breadth. if the height of the room is 4m, find the area of the floor
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Hi ,
Let breadth of the room ( b ) = x m
Length ( l ) = 2x m
Height ( h ) = 4 m
Area of 4 walls of the room = 120 m²
2( l + b ) h = 120
2 ( 2x + x ) × 4 = 120
8 × 3x = 120
x = 120 / ( 8 × 3 )
x = 5
Therefore ,
l = 2x = 2 × 5 = 10m
b = x = 5 m
I hope this helps you.
:)
Let breadth of the room ( b ) = x m
Length ( l ) = 2x m
Height ( h ) = 4 m
Area of 4 walls of the room = 120 m²
2( l + b ) h = 120
2 ( 2x + x ) × 4 = 120
8 × 3x = 120
x = 120 / ( 8 × 3 )
x = 5
Therefore ,
l = 2x = 2 × 5 = 10m
b = x = 5 m
I hope this helps you.
:)
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