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Question

Two rectangular plots of length 40 m and width 20 m are as shown:

What is the cost of fencing the plots at ₹ 4 per metre?

A
₹ 16000
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B
₹ 1600
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C
₹ 640
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D
₹ 6400
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Solution

The correct option is C ₹ 640

The rectangular plots shown form a square of side 40 m.

Perimeter of square = 4×Length
= 4×40
= 160 m

Cost of fencing = (Total Perimeter) x (Cost per metre)
= 160×4 = ₹ 640

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