A gardener want to fence a circular garden of diameter 21m. Find the length of rope he needs to purchase,if he makes 2 rounds of fence. Also find the cost of rope, if it's price is rs. 4.50 per meter.
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Solution :-
❏ As we know that, fencing is done on the boundary , so we have to find the Circumference of the Circle .
⟾ Circumference of Garden = πd
⟾ Circumference of Garden = 22/7 × 21
⟾ Circumference of Garden = 22 × 3
⟾ Circumference of Garden = 66m
So, 66m of rope is required to fence the Garden in 1 time.
Now,
⟾ Rope required in 2 rounds = 66 × 2
⟾ Rope required in 2 rounds = 132m
Therefore, 132m of rope is required to fence the Garden 2 times.
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➞ Cost of 1m rope = 4.50
➞ Cost of 132m rope = 4.50 × 132
➞ Cost of 132m rope = Rs 594
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Therefore :
Total Rope required = 132m
Cost of Total Rope = Rs 594
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