Multiple choice

4310 is invested into three parts at simple interest so that the amounts received after 1, 2 and 3 years respectively in each part are equal. Find the amount invested for 3 years, if the rate of interest is 10 % p.a. 4310 साधारण ब्याज पर तीन भागों में इस प्रकार से निवेश किया गया कि क्रमश: 1, 2 और 3 साल में प्रत्येक भाग से प्राप्त मिश्रधन बराबर है । यदि ब्याज की दर 10% प्रति वर्ष है तो 3 साल के लिए निवेश की गई राशि ज्ञात कीजिये।

  1. 1230

  2. 1320

  3. 3210

  4. 2130

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B Correct answer
Explanation

For equal maturity amounts at simple interest, investments are inversely proportional to time periods. Ratio of investments for 1,2,3 years is 1/1:1/2:1/3 = 6:3:2. Sum of parts = 11. Amount for 3 years = (2/11)×4310 = Rs. 1320.