Multiple choice

A certain sum of money at a certain simple rate of interest, becomes Rs. 2100 in 2 years and Rs. 2250 in 5 years. Find rate of interest. एक निश्चित साधारण ब्याज दर पर एक निश्चित राशि, 2 साल में 2100 रुपये और 5 साल में 2250 रुपये हो जाती है। ब्याज दर ज्ञात कीजिये

  1. 10%

  2. 5%

  3. 2.5%

  4. 1.2%
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Interest for 3 years (from year 2 to year 5) = Rs. 2250 - Rs. 2100 = Rs. 150. Annual interest = Rs. 150 ÷ 3 = Rs. 50. Principal = Amount after 2 years - Interest for 2 years = Rs. 2100 - (Rs. 50 × 2) = Rs. 2000. Rate = (Annual Interest ÷ Principal) × 100 = (50 ÷ 2000) × 100 = 2.5%.

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