The diameter of a circular park is 104 m. A road of width 3.5 m is on the outside around it.
Find the cost of constructing the road at rupees 15 per square metre
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Answer:
radius of cirular park without road isR=52
and radius of circular park with road is=52+3.5=55.5
Now,area of road =π(R2-r2(
=22/7[(55.5)^2-52^2]
=22/7(3080.25-2704)
=22/7×376.25
=22×53.75
=1182.5
the cost of constructing the road =1182.5÷15
=Rs17737.5
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