Find the cost of fencing around a circular field of diameter 28 m at the rate of Rs.1.50 a meter?
Correct answer: B. Rs.132
- A. Rs.150
- B. Rs.132
- C. Rs.100
- D. Rs.125
Explanation
The field's circumference is πd = (22/7) x 28 m = 88 m. Fencing cost = 88 m x Rs.1.50 per m = Rs.132, so option b follows. A common mistake is option a, Rs.150, from using the area formula instead of the circumference formula.
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