Question

a sum of money becomes 8/5 of itself in 5yrs at a certain rate of SI. Find the rate of intrest.

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Answer 1

Answer:

Time is given as 5 years. So as per given values. So, the rate of interest is equal to 12 percent per annum.

Step-by-step explanation:

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Answer 2

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• Let the principal be P.
• A/Q A = 8/5P

Given :-

T = 5years

WKT, SI = A-P

= 8P/5 -P

SI =3P/5

Again ,

SI =PRT/100

3P/5=PRT/100

3/5=5R/100

R=3*20/5

R=3*4

R=12.

• The required rate of interest is 12%.