Question

The interest on a certain deposit at 4.5% p.a. is Rs. 405 in one year. How much will the additional interest in one year be on the same deposit at 5% p.a. ?

Answer 1

Answer:

RS.45

Step-by-step explanation:

Expl : S.I. = Rs. 405 R = 4.5% T = 1 year

Principal = (100 *405)/(4.5*1) = Rs.9000

S.I at 5% interest = (9000*5*1)/100 = Rs.450

Difference in interest = 450 – 405 = Rs.45

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Answer 2

Answer:

Given:- S.I= Rs 405

            T= 1 year

            R= 4.5% p.a.

            P= $\frac{S.I*100}{R*T}$

To find:- Additional interest in one year on the same deposit at 5% p.a.=?

Step-by-step explanation:

             P= $\frac{405*100}{4.5*1}$= Rs 9000

             S.I= $\frac{9000*5*1}{100}$= Rs 450

             Therefore, Additional interest= 450-405= Rs 45