A certain sum of money at simple interest amounts to Rs 1012 in `2 1/2` years and to Rs 1067.20 in 4 years. The rate of interest per annum is (a) 2.5% (b) 3% (c) 4% (d) 5%

A sum of money at simple interest amounts to Rs.1,012 in 2 1/2 years and to Rs. 1,067.20 in 4 years. The rate of interest per annum is :

A sum of money amounts to Rs 5200 in 5 years and to Rs 5680 in 7 years at simple interest. The rate of interest per annum is: (a) 3% (b) 4% (c) 5%

A certain sum of money amounts to Rs. 918 in 2 years and Rs. 969 in 3.5 years at simple interest. What is the rate of interest (in % per annum)?

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 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%

The simple interest and compound interest of a certain sum of money for two years are Rs. 400 and Rs. 410 respectively. Then the rate of interest per annum is 5%.