Question 8 The cost of fencing a circular field at the rate of Rs.24 per metre is Rs. 5280. Find the radius of the field.Total cost of fencing a circular field = Rs 5280
Cost of fencing per meter = Rs 24
So, Total Length of field = (๐๐๐ก๐๐ ๐๐๐ ๐ก ๐๐ ๐๐๐๐๐๐๐ )/(๐๐๐ ๐ก ๐๐ ๐๐๐๐๐๐๐ ๐๐๐ ๐๐๐ก๐๐)
= 5280/24
= 220 m
Here,
Total length of the field would be circumference of the circular field .
Total length = Circumference of circular field
1/2 marks
220 = 2ฯr
2ฯr = 220
2 ร22/7ร r = 220
(44 ร r)/7 = 220
r = (220 ร 7)/44
r = 35 m
1/2 marks

CBSE Class 10 Sample Paper for 2021 Boards - Maths Basic

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.