Question

A gardener wants to fence a circular garden of diameter 21m.Find the length of the rope he needs to purchase, if he makes two rounds of fence.

Answer 1

Answer:

693㎡

Step-by-step explanation:

area of circle=∏r2 fencing it two times=2∏r2

2*22/7*21/2*21/2

2*22*3/2*21/2

11*3*21

693

Answer 2

Answer:

Step-by-step explanation

The length of the rope needed= The circumference of the garden

Given d=21 m

∴ r = 21÷2

Circumference=2πr

                        =2×22÷7×21÷2

                        =66m

The length rope he needs to purchase = 2×66

                                                                 = 132m

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