brendayenni brendayenni

27-02-2016
Mathematics

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a rectangular room is three times as long as it is wide, and its perimeter is 80 meters. find the length of the room

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olemakpadu olemakpadu

27-02-2016

Let the width of the room be = x

Length of the room = 3x, Since it is three times as wide

Perimeter = 80m

Perimeter = 2*(L + W) = 2*(3x + x) = 80

2*(3x + x) = 80

2*(4x) = 80

8x = 80 Divide both sides by 8

x = 80/8

x = 10, But length = 3x, = 3*10 = 30

Length = 30m

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