Question

If principal becomes 5times in 4 years find the rate of interest?

Answer 1

Answer :-

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Given ,

• Principal becomes 5 times in 4 years.

To find ,

• The rate per annum.

Now ,

Let , the principal = p

time ( t ) = 4 years

rate per annum = r%

and interest ( I ) = ( 5p - p ) = 4p

[ • Note :- Principal becomes 5 times in 4 years ]

Now , It's a simple interest so as the formula

Intereste = ( Principal × time × rate ) / 100

4p = ( p × 4 × r ) / 100

•°• r = 100

So , the rate per annum is 100%

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