The diameter of a circular park is 80 metres. A 4 m wide road runs outside around it. Find the cost of constructing
the road at 10 per sq metre.
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Step-by-step explanation:
radius=80/2= 40
circumference=2πr m
= 2*22/7*40 m
= 228.5 m
area of road= 228.5*4 sq m
= 514 sq m
cost= ,514*10$
= 5140$
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