# QA – Placement Quizzes | Simple Interest | Question 12

The SI on a sum is 1/4^{th} of the principal, and the duration(in years) is equal to the rate per cent per annum. Find the rate per cent.**(A)** 5**(B)** 11/10**(C)** 10**(D)** 11**Answer:** **(A)****Explanation:** SI= PRT/100

R=SI X100/(P X T)

= (P/4)X100/PXR

R^{2} = 100/4

R=5

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