The area of a circular field is 13.86 hectares . The cost of fencing it at the rate of 20 paisa per meter is?
Correct Answer: Rs. 264
Explanation:
∵ 22/7 x r2 = 13.86 x 10000
⇒ r2 = (13.86 x 10000 x 7) / 22
∴ r = 210 m ⇒ Circumference = [2 x (22/7) x 210 ] m
= 1320 m Cost of fencing = Rs. (1320 x 20)/100
= Rs . 264
