CBSE Class 10 Sample Paper for 2021 Boards - Maths Basic

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Question 8 - CBSE Class 10 Sample Paper for 2021 Boards - Maths Basic - Solutions of Sample Papers for Class 10 Boards

Last updated at December 16, 2024 by

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

The cost of fencing a circular field at the rate of Rs 24 per metre is

Question 8 - CBSE Class 10 Sample Paper for 2021 Boards - Maths Basic - Part 2

Note : This is similar to Example 1 of NCERT ā€“ Chapter 12 Class 10

Check the answer here https://www.teachoo.com/1880/549/Example-1---The-cost-of-fencing-a-circular-field-at-rate/category/Examples/

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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 = (š‘‡š‘œš‘”š‘Žš‘™ š‘š‘œš‘ š‘” š‘œš‘“ š‘“š‘’š‘›š‘š‘–š‘›š‘” )/(š‘š‘œš‘ š‘” š‘œš‘“ š‘“š‘’š‘›š‘š‘–š‘›š‘” š‘š‘’š‘Ÿ š‘šš‘’š‘”š‘’š‘Ÿ) = 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 = 2Ļ€r 2Ļ€r = 220 2 Ɨ22/7Ɨ r = 220 (44 Ɨ r)/7 = 220 r = (220 Ɨ 7)/44 r = 35 m 1/2 marks

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