the perimeter of a rectangle is 60cm.if its area is 200cm2,find its length and breath in centimeters
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Answer:
Step-by-step explanation:
2(l+b)=60
l+b=30 ------- (1)
l*b=200
l=200/b
Putting in equation 1 we get
200/b+b=30
200+b^2-30b=0
b^2-30b+200=0
b^2-20b-10b+200=0
b(b-20)-10(b-20)=0
(b-10)(b-20)=0
b=10, b=20
l=200/b
l=200/20
l=10cm
OR
l=200/10
=20cm
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