Asif deposited Rs. 7000 in his account and he had Rs. 8050 after 4 years. What was the yearly interest rate (simple interest)

A person deposited Rs. 500 for 4 years and Rs, 600 for 3 years at the same rate of simple interest in a bank. Altogether he received Rs. 190 as interest. The rate of simple interest per annum was :

Sushma deposited Rs. 6500 which amounted to Rs. 7800 in 4 years at simple interest. Had the interest been 2% more per annum, how much would she have received ? (in Rs.)

A person deposited Rs 400 for 2 years, Rs 550 for 4 years and Rs 1200 for 6 years. He received the total simple interest of Rs 1020. The rate of interest per annum is (a) 5% (b) 10% (c) 15% (d) 20%

A sum amounts to Rs. 5600 in 4 years and Rs. 6400 in 6 years at a certain rate of simple interest. Find the rate of interest per annum and the sum.

A man invested Rs. 1000 on simple interest at a certain rate and Rs. 1500 at 2% higher rate The total interest in three years is Rs. 390 What is the rate of interest for Rs. 1000 ?