Question

A gardener wants to fence a circular garden of diameter 28 m. find the length of the rope he needs to purchase ,if he makes 2 rounds of fence​

Answer 1

Answer:

Step-by-step explanation:

Diameter of the circular garden=21m

∴ Radius of the circular garden=221​m

Now, circumference of circular garden=2πr=2×722​×221​

=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.

Answer 2

Answer:

Since the gardener make two rounds of the fence

Thus,

The length of rope required = 2× Circumference of the garden

Given that,

Diameter = 21

Radius = 21/2=

Atq,

Circumference of the garden = 2 × 22/7 × 21/2

= 22/7 × 21. ( 2 will cancel 2)

= 22 × 3

= 66 m