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Q.

A rectangular plot of land is 110 m by 100 m. If the cost of fencing per meter is Rs.10, then the cost of fencing the entire field is

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a

Rs.4,200

b

Rs.420

c

Rs.1,420

d

Rs.4,800

answer is A.

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Detailed Solution

Perimeter of fencing

= 2 (l + b)

$= 2 [110 + 100]$ cm

$= 2 \times 210$ cm

$= 420 c m$

Cost of fencing $= 420 \times 10$

$= R s .4200$

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