Find the cost of ploughing a rectangular field whose length is 2 km and breadth is 1 km at the rate of ₹ 50 per square metre.

₹ 10,00,00,000

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₹ 1,00,00,000

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₹ 10,00,000

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₹ 20,00,00,000

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Solution

The correct option is A
₹ 10,00,00,000

Given,
length of the rectangular field, l = 2 km = 2000 m

breadth of the rectangular field, b = 1 km = 1000 m

$∵$ Area of the rectangular field = l x b
= 2000 x 1000
= 2000000 $m^{2}$

Given,
cost of ploughing = ₹ 50 per $m^{2}$

$∴$ Total cost = total area x cost per square metre
= 2000000 x 50
= ₹ 10,00,00,000

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