Question

principal = Rs 3500 , time = 1 year 3 month , interest rate = 8%

Answer 1

Hey Bro.


It seems your question is incomplete but I guess you have asked for Simple Interest.

So, using formula of S.I. = $\frac{P X R X T}{100}$

It is given that 
Principle, P = Rs. 3500.
Time, T = 1 Yr. + 3 months = 1 + 3/12
                                            = 1 +  1/4 = 5/4 yrs.
Rate of Interest, R = 8%.


= $\frac{3500 X 8 X \frac{5}{4}}{100} \\ =35 X 10 \\ = 350$

Hence, SI is Rs. 350.

Also, the new amount after 1 yr 3 months, A = P + SI
= 3500 + 350
= Rs. 3850

Hope it helps