The length and breadth of a rectangular park are in the ratio 5:4 and its area is 2420 m². Find the cost of fencing the park at the rate of ₹10 per metre.
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Step-by-step explanation:
the are of rectangular=l×b
5x×4x=2420
20x²=2420
x²=2420/20
x²=121
x=√121
x=11
5x=5×11=55
4x=4×11=44
the perimeter of rectangular=2(l+b)
=2(55+44)
=2×99
=198
198×10= 1980 ans
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