26-08-2016
Mathematics

contestada

A rectangle has a perimeter of 18cm. Its length is 5 cm greater than its width. Find the dimensions.

Respuesta :

Kunchan Kunchan

26-08-2016

length, l
width, w

l = w + 5

18 = 2l + 2w
9 = l + w
9 = w + 5 + w
4 = 2w
w = 2

l = w + 5
l = 7

length = 7 cm
width = 2 cm

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