A rectangular field has perimeter 300 m and length 90 m. Find the cost of ploughing the field at ₹80 per square metre.

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Answer & Explanation

Correct AnswerA. ₹4,32,000

Quick Explanation

2(L+W)=300, so W=60 m. Area = 90 × 60 = 5400 sq m. Cost = 5400 × 80 = ₹4,32,000.

Area = L*W; Cost = Area*rate

2(L+W)=300, so W=60 m. Area = 90 × 60 = 5400 sq m. Cost = 5400 × 80 = ₹4,32,000.

Use the standard formula directly after identifying the quantities.

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