SOLUTION: a rectangle length is 5cm more than its width.if the preimeter is 40cm find the length and width

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Question 2275: a rectangle length is 5cm more than its width.if the preimeter is 40cm find the length and width

Answer by gsmani_iyer(201) About Me  (Show Source):
You can put this solution on YOUR website!

perimeter(p) = 2l + 2b = 2(l+b)
Let the width be = x cm

So length = x + 5 cms.

By applying the above formula,

40 cms = 2(x+x+5)

20 cms = x+x+5 = 2x+5

2x = 20-5 = 15

x = 15%2F2 = 7.5 cms.

So width = 7.5 cms.; length = 7.5+5 = 12.5 cms. Ans.