A gardener wants to fence a circular garden of diameter 35 m . Find the length of the rope he needs to purchase ,if he makes 5 rounds of fence. Find the cost of the rope if it costs ₹ 20 per metre. ( = 22 7 )
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Given : A gardener wants to fence a circular garden of diameter 35 m .
he makes 5 rounds of fence.
costs ₹ 20 per metre
π = 22/7
To Find : The length of the rope he needs to purchase
the cost of the rope
Solution:
Circumference of a circle = 2πr
r = radius = Diameter/2 = 35/2 m
π = 22/7
Rope required for one round = 2 * (22/7) (35/2)
= 22 * 5
= 110 m
Rope required for 5 round = 5 * 110 = 550 m
cost of the rope = 550 * 20 = 11000 Rs
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