The length of a room is y metres. Write the breadth of the room which is 20 m less than twice the length. Write an algebraic expression for the perimeter of the room.
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Step-by-step explanation:
Length of the room=y metre
Breadth of the room=(2y-20) metres
Perimeter of the room=2 (L+B)
=2(y+2y-20)
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