Find the simple interest on Rs. 68,000 at 16 2/3% per annum for 9 months.
Find the simple interest on Rs. 3000 at 6 1/4% per annum for the period from 4th Feb. 2005 to 18th April 2005.
A sum fetched a total simple interest of Rs. 4016.25 at the rate of 9 p.c.p.a. in 5 years. What is the sum?
A sum of Rs. 800 amounts to Rs. 920 in 8 years at simple interest. Interest rate is increased by 3%, it would amount to how much?