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- Find the rate at Simple interest, at which a sum becomes four times of itself in 15 years.
Question 1:
Find the rate at Simple interest, at which a sum becomes four times of itself in 15 years. A. 10%
B. 20%
Feedback Let sum be x and rate be r% then, (x*r*15)/100 = 3x [important to note here is that simple interest will be 3x not 4x, beause 3x+x = 4x]
=> r = 20%
=> r = 20%
C. 30%
D. 40%
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