The difference between the simple interest received from two different sources on Rs 1500

Answer : Let the rates of interest  be x% pa and y% pa then,

(1500 x x/100 x 3) – (1500 x y/100 x 3) = 27/2 => 45(x - y) = 27/2  => (x  -y) = (27/2 x 1/45) = 3/10 = 0.3

Required difference = 0.3%. Hence the answer is (c)

Correct Answer:

Description for Correct answer:

Let the rate of interest for two different sources is r1 and r2 respectively.According to question,\( \Large \frac{1500 \times r1 \times 3}{100}-\frac{1500 \times r2 \times 3}{100}\)=13.50\( \Large 4500r1-4500r2=1350 \)\( \Large \left(r1-r2\right)=\frac{1350}{4500} =0.3 \)%

Hence,Required difference in rate=0.3%

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