Mensuration · Question 22 · Medium
A circular park has an area of 154 m². What is the cost of fencing it all around at ₹25 per metre? (Use π = 22/7)
- ₹550
- ₹1,100
- ₹3,850
- ₹1,175
Answer and explanation
Answer: B. ₹1,100
Explanation: πr² = 154 gives r² = 49, so r = 7 m. Circumference = 2 × 22/7 × 7 = 44 m. Cost = 44 × 25 = ₹1,100.
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