The cost of a machine decreases-by 10 - 25300- 25000- 24300-

The correct option is D ₹ 24300 Cost of machine = ₹ 30000. Rate of decrease = 10 ...

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Standard VII

Mathematics

Percentages as Equivalent Fractions

The cost of a...

Question

The cost of a machine decreases by 10 % every year. Find the price after 2 years ,if the initial cost of the machine was ₹ 30000.

₹ 25300

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₹ 24700

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₹ 24300

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₹ 25000

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Solution

The correct option is C
₹ 24300

Cost of machine = ₹ 30000.

Rate of decrease = 10%

Cost of the machine at the end of first year = $₹ 30000 - \frac{10}{100} \times 30000$

= ₹ 30000 - ₹ 3000 = ₹ 27000

Cost of the machine at the end of second year = $₹ 27000 - \frac{10}{100} \times 27000$

= ₹ 27000 - ₹ 2700 = ₹ 24300

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The cost of a machine decreases by 10 % every year. Find the price after 2 years ,if the initial cost of the machine was ₹ 30000.

The correct option is C ₹ 24300 Cost of machine = ₹ 30000. Rate of decrease = 10% Cost of the machine at the end of first year = ₹30000−10100×30000 = ₹ 30000 - ₹ 3000 = ₹ 27000 Cost of the machine at the end of second year = ₹27000−10100×27000 = ₹ 27000 - ₹ 2700 = ₹ 24300