Question

Mehul wants to fence a circular garden of diameter 35 m. Find the cost of fencing it at the rate of 10 per meter ( take π= 2 / 7 )​

Answer 1

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.