Peter invested an amount of Rs. 12,000 at the rate of 10% p.a simple interest a

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Peter invested an amount of Rs. 12,000 at the rate of 10% p.a simple interest and another amount at the rate of 20% p.a. simple interest. The total interest earned at the end of one year on the total amount invested became 14% p.a. Find the total amount invested?

Options:

A . Rs. 20,000

B . Rs. 22,000

C . Rs. 24,000

D . Rs. 25,000

Answer: Option A

Let the second amount be Rs. x. Then,(12000 * 10 * 1)/100 + (x * 20 * 1)/100 = [(12000 + x) * 14 * 1] / 100120000 + 20x = 16800 + 14xx = 8000Total investment = 12000 + 8000 = Rs. 20,000.

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