CBSE Class 10 Sample Paper for 2021 Boards - Maths Basic

Class 10
Solutions of Sample Papers for Class 10 Boards

## The cost of fencing a circular field at the rate of Rs.24 per metre is Rs. 5280. Find the radius of the field.

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Note : This is similar to Example 1 of NCERT β Chapter 12 Class 10

### Transcript

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 = (πππ‘ππ πππ π‘ ππ πππππππ )/(πππ π‘ ππ πππππππ πππ πππ‘ππ) = 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 = 2Οr 2Οr = 220 2 Γ22/7Γ r = 220 (44 Γ r)/7 = 220 r = (220 Γ 7)/44 r = 35 m 1/2 marks