Question

Simple interest on a certain sum is of the sum. Find the rate per cent and the time if both are numerically equal.​

Answer 1

Answer:

actually the whole question is simple interest on a certain sum is 16/25 of the sum so according to this if solved then the steps to be followed are:

Step-by-step explanation:

according to the question let the time and rate percent is equals to R.

then time = R years

rate of interest = R%

let the Principal = x

S.I = 16/25x

16/25 x= P×R×T/100

=>16x/25= X×R×R/100

16x/25 = x * R * R/100

                        16x/25 = xR^2/100

                        16/25 = R^2/100

                       1600 = 25R^2

                       1600/25 = R^2

                       64 = R^2

                       R = 8.

therefore the time and rate of interest is8 yrs and 8 % respectively.

hope you are satisfied with the answer...