Question

1. A gardener wants to make 2 rounds of fence around his circular garden of diameter 21 m. Find the cost of the
fence at * 12 per metre.
​

Answer 1

Answer:

diameter of circular garden is 21m

NOW,

circumference =2πr

=22/7*21

=22*3

=66m

cost of wire is 4 per meter

Total cost of wire =66*4

=Rs264 ans.

Answer 2

Step-by-step explanation:

ANSWER

Diameter of the circular garden=21m

∴ Radius of the circular garden=

2

21

m

Now, circumference of circular garden=2πr=2×

7

22

×

2

21

=22×3=66m

The gardener makes 2 rounds of fence so the total length of the rope of fencing =2×2πr=2×66=132m

Since the cost of 1 meter rope=Rs. 4

Therefore, cost of 132 meter rope=4× 132=Rs. 528.

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