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16-09-2015
Mathematics

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the perimeter of a rectangular pool 160 meters. The length of the pool is 20 meters more than it's width. What is the length?

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nheytiry nheytiry

16-09-2015

Width=w
Length=l
Perimeter=p

p=2w+2l
l=20+w
p=2w+20+w+20+w
p=4w+40

4w+40=160
4w=160-40=120
w=120:4=30
w=30
l=20+w
l=20+30=50

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