Rs. 800 amounts to Rs. 920 in 3 years at simple interest. If the interest rate is increased by 3%, it would amount to how much ?

A. Rs. 992 B. Rs. 1112 C. Rs. 1056 D. Rs. 1182

A sum of Rs. 2500 amounts to Rs. 3875 in 4 years at the rate of simple interest. What is the rate of interest?

A. 12.25% B. 12% C. 6% D. 13.75%