the area of four walls of a room is 150 m square 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 the width of room be a
Length of room = 2a
According to question
Area of four walls = 150 m^2
=> 2(L+B) *H =150
=> (a+2a) * 4 = 75
=> 3a *4 = 75
=> a = 25 / 4
=> a = 6.25
Width of room = 6.25 m
Length of room = 12.5 m
Area of floor = Length *Width
= 6.25 * 12.5
= 78.13 cm^2
Length of room = 2a
According to question
Area of four walls = 150 m^2
=> 2(L+B) *H =150
=> (a+2a) * 4 = 75
=> 3a *4 = 75
=> a = 25 / 4
=> a = 6.25
Width of room = 6.25 m
Length of room = 12.5 m
Area of floor = Length *Width
= 6.25 * 12.5
= 78.13 cm^2
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