Question

S.I. on Rs. 1500 at 7% per annum for a certain time is Rs. 210. Find the time ?

Answer 1

S.I. = 210
T = ?
P = 1500
R = 7%

S.I. = PRT/100
210 = 1500*7*T/100
T = 2 years.

Answer 2

Solution :

Here, the given amount or the principal is ₹ 1500

Rate : 7% per annum .

Let the time for which the interest compounded be t years.

We are keeping in terms of years for a simplified solution .

Required SI :

> [ Principal ] x { Rate per time interval , which is here in years } x { Time taken } / 100

> [ 1500 ] x [ 7 ] x [ t ]/100

> 105 t

But, the value is 210

So, 105t = 210

t = [ 210/105] years

> t = 2 years.

Thus, the time duration of the interest is 2 years.

This is the required answer.

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