Question

5. The radius dla circular Park is 2.1 m. Find the cost of lencing it at the rate of 15 per metre.
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Answer 1

Given:

• The radius of a circular park = 63 m

• Rate = Rs. 12 per meter

To Find:

• The cost of fencing

Solution :

⇒ Radius (r) = 63 m

★ Find the Circumference:

Circumference of the circle = 2 π r

⇒ 2 × 22 / 7 × 63

⇒ 44 / 7 × 63

⇒ 44 × 9

⇒ 396 m

Circumference of the circle = 396m

____________________________

★ Find the cost of fencing:

Circumference × Rate

⇒ 396 × 12

⇒ 4,752

Therefore,

(A) Rs. 4,752

The cost of fencing is Rs. 4,752