A certain sum amounts to Rs.1725 in 3 years and Rs.1875 in 5 years. Evaluate the rate % per annum?

One Answer on this Question

1. A certain sum amounts to Rs. 1725 in 3 years

   and amounts to Rs.1875 in 5 years

   so interest of 2 years = 1875 -1725

   = 150

   so interest of 1 year = 75

   so interest of 3 years = 75 × 3 =225 rs

   so , Principal = Amount – SI

   = 1725 – 225

   = 1500 rs

   now ,

   S.I. = P × N × R /100

   75 = 1500 × 1 × R /100

   R = 75 / 15

   R = 5%

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