Question

To fence a circular garden, the total cost is rs 26,400 at the cost of rs 50 per metre. Find the radius of the circle?

Answer 1

Total cost of fencing = Rs. 26,400
cost of fencing = Rs.50 per meter
Total length of fence = 26,400/50 = 528m

Thus perimeter of circular garden = 528 m
If the radius is R
2πR = 528
⇒R = 528/2π
⇒R = (528×7)/(2×22) 
⇒R = 84 m

Radius is 84 m.

Answer 2

2(pie)(r)(50)=26400
r=26400/3.14(100)
=26400/314
=84