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Simple Interest & Compound Interest

A sum is inve...

Question

A sum is invested for 3 yrs compounded at 5%, 10%, and 20% per annum, respectively. In 3 yr, if the sum amounts to Rs 1386, then find the sum.

Rs 1500

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Rs 1400

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Rs 1200

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Rs 1000

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Solution

The correct option is D Rs 1000
Amount $= 1386 = P \times (1 + \frac{5}{100}) \times (1 + \frac{10}{100}) \times (1 + \frac{20}{100}) o r 1386 = P (\frac{21}{20}) \times (\frac{11}{10}) \times (\frac{6}{5})$
Solving it, we get P = Rs 1000
Hence, option (d) is the answer.

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A sum is invested for 3 yrs compounded at 5%, 10%, and 20% per annum, respectively. In 3 yr, if the sum amounts to Rs 1386, then find the sum.

The correct option is D Rs 1000Amount =1386=P×(1+5100)×(1+10100)×(1+20100) or 1386=P(2120)×(1110)×(65) Solving it, we get P = Rs 1000 Hence, option (d) is the answer.

The correct option is D Rs 1000
Amount $= 1386 = P \times (1 + \frac{5}{100}) \times (1 + \frac{10}{100}) \times (1 + \frac{20}{100}) o r 1386 = P (\frac{21}{20}) \times (\frac{11}{10}) \times (\frac{6}{5})$
Solving it, we get P = Rs 1000
Hence, option (d) is the answer.