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Question

What would be the cost of fencing a square field of side 10 m at the rate of ₹ 20 per metre?
  1. ₹ 800
  2. ₹ 700
  3. ₹ 500
  4. ₹ 600


Solution

The correct option is A ₹ 800
Perimeter of the square field = 4 × side
                                                = 4 × 10
                                                = 40 m
Cost of fencing the field = Cost per unit length x Perimeter of the square field
= 20 × 40
= ₹ 800

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