Question

A sum of money lent at simple interest amounts to 17,145 rs in 3 years and to 19,575 rs in 5 years. find the sum and the rate of interest​

Answer 1

Answer:

this is an inappropriate question actually , you have to give the interest percentage or rate , than only the formula will be applied on this question and the answer would be given out.

Step-by-step explanation:

Answer 2

Step-by-step explanation:

Given: SI for 3 years= 17145,

for 5 years 19575

To find: the sum and the rate of interest

Solution:

Simple interest = p*r*t/100

amount= p+SI

the amount for 3 years - 17,145

the amount for 3 years - 17,145the amount for 5 years - 19575

SI for 3 years = Amount-Principal

17145-p

SI for 5 years = Amount - Principal, 19575-p

SI for 2 years = 19575-p - (17145-p)= 2430.

principal= 2430

therefore p for 1 year 2430/2= 1215

p for 3 years = 1215*3 = 3645

SI = p-a

17145-3645= 13500.

SI = p*r*t/100

3645= 13500*3*r/100

r= 9%.

Hence, Sum is 13500 and Rate of interest - 9%