Question

The cost of fencing a field at the rate of Rs. 24 per meter is Rs.5280. find the radius of the circle

Answer 1

Answer:

Step-by-step explanation:

2πr=5280/24

2πr=220

44r=220*7

r=5*7

=35cm

Answer 2

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Cost of fencing 1m²=₹24

We have the circumference of given field = 2πr beacuse circumference of circle is 2π

r

So cost of fencing 2πr meters:-

=2πr×24=48πr

Cost of fencing the field is given:-

So, 48πr=5280

Dividing both sides by 48πr, we get

$\sf \:r = \frac{5280}{48\pi r} = \frac{485}{4\pi} = 35m$

So radius of field is 35m

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