A man invested $₹7000$ at $8\%$per annum simple interest for $2 \mathrm{years}$ and $₹10000$ at compound interest at the same rate for same period, compounded annually. What will be the total interest and the total amount respectively on maturity?

What is the ratio of simple interest earned on certain amount at the rate of $12\%$ p.a. for $9$ years and that for $12$ years ? 

1. $1:2$
2. $2:3$
3. $3:4$
4.$4:5$

What will be the simple interest on a sum of Rs. 10000 after 3 years at the rate of 7.3% per annum? 

(A) Rs. 2,190 

(B) Rs. 2,19,000 

(C) Rs. 2,200 

(D) Rs. 2,180 

A sum of $₹ 2500$ becomes $₹ 8100$ in $2$ years at a certain rate of compound interest. What will be the sum (in $₹$) after $4$ years?

On a certain principal, simple interest amounts to Rs. 1000 in 1 year at the rate of 10% p.a. What will be the effective rate of interest if the same is compounded on a half-yearly basis?

1. 10.10
2. 10.15
3. 10.20
4. 10.25