Question

Q. The radius of a circular garden is 56m .What would
it cost to put a 4-round fence around this garden rate of 40 rupees per metre?


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Answer 1

Radius of the garden= 56m

Circumference of the garden = 2×22/7×56= 352m

Cost of fencing for 1m=Rs.40

Cost of fencing for one round= 352×40= Rs.14,080

Cost of fencing for four rounds= 14080×4= Rs.56,320

So the final answer is 56,320 Rs.

Answer 2

Answer:

Given:

Radius of circle = 56m

The fence will be made 4 times around the circumference.

To find:

Total cost at a rate of Rs 40/metre.

Concept:

First find out the circumference.

Then find out the total circumference by multiplying with 4 as the question asks for 4 times.

Finally calculate the total cost .

Calculation:

Circumference of circle = 2πr

=> Circumference = 2 × (22/7) × 56

=> circumference = 352 m

Total circumference = 4 × 352

=> Total circumference = 1408 m

Total cost = 40 × 1408

=> Total cost = Rs 56,320.