Multiple choice

Amit deposited two parts of a sum of Rs. 25000 in different banks at the rates of 15% per annum and 18% per annum respectively. In one year he got Rs.4050 as the total interest. What was the amount deposited at the rate of 18% per annum? अमित ने 25000 रू. के दो भाग अलग-अलग बैकों में 15% और 18% वार्षिक की दर से जमा कराये। यदि एक वर्ष में उसको 4050 रू. का ब्याज मिला तो 18% ब्याज दर पर कितना धन लगाया गया था?

  1. Rs./रू.10000

  2. Rs./रू.12000

  3. Rs./रू.15000

  4. Rs./रू.18000
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A Correct answer
Explanation

Let amount at 18% be x. Then 0.15(25000-x) + 0.18x = 4050. 3750 - 0.15x + 0.18x = 4050. 0.03x = 300. x = 10000. Verify: 15000 at 15% gives 2250, 10000 at 18% gives 1800, total = 4050. Correct.

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