The length of rectangular plot is 20 metres more than its breadth. If the cost of fencing the plot at 26.50/m is 5300, what is the length of plot in metres?
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Answer:
length l=b+20
Perimeter=2(l+b) = 2(b+20+b)
= 4b +40 = 53oo/26.50 = 200
4 b+40 =200
4 b = 200-40=160
b = 160/4=40
I=.b+20 = 40+20 =60m
length is 60 meters
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