A sum of Rs.1600 gives a simple interest of Rs.252 in 2 years and 3 months. The

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A sum of Rs.1600 gives a simple interest of Rs.252 in 2 years and 3 months. The rate of interest per annum is:

Options:

A . 8%

B . 5$1/2$%

C . 6%

D . 7%

Answer: Option D
Answer: (d)Using Rule 1,Principal (P) = Rs.1600T = 2 years 3 months= $(2 + 3/12) yrs. = (2 + 1/4) yrs. = 9/4 yrs.$S.I = Rs.252R = % rate of interest per annumR = ${100 × S.I.}/{P × t}$= ${100 × 252}/{1600 × 9/4}$Rate of interest = 7% per annum.

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