Multiple choice

A lent Rs. 600 to B for 2 years and Rs. 150 to C for 4 years and received altogether from both Rs. 90 as simple interest. Find the rate of interest.

  1. 12%

  2. 10%

  3. 5%

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

Total interest = (600 * r * 2 / 100) + (150 * r * 4 / 100) = 90. 12r + 6r = 90. 18r = 90, so r = 5%.

AI explanation

Using the formula for total simple interest received, the equation is 90 = (600 * Rate * 2) / 100 + (150 * Rate * 4) / 100. This simplifies to 90 = 12 * Rate + 6 * Rate, or 90 = 18 * Rate. Solving this gives a rate of 5%.

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