A washing machine is available for Rs. 13,500 cash or Rs. 6,500 as cash down payment followed by three monthly instalments of Rs. 2,500 each. Find the rate of interest charged under instalment plan.

Raghav buys a shop of Rs. 1,20,000. He pays half of the amount in cash and agrees to pay the balance in 12 annual instalments of Rs. 5000 each. If the rate of interest is 12% and the pays with the instalment the interest due on the unpaid amount, find the total cost of the shop.

If Manohar pays an interest of Rs 750 for 2 years on a sum ofRs 4,500, find the rate of interest.

A bill off Rs 1,000 drawn on 7th May, 2011 for six months was discounted on 29th August, 2011 for cash payment of Rs 988. Find the rate of interest charged by the bank.

A farmer buys a used tractor for Rs. 12000. He pays Rs. 6000 cash and agrees to pay the remaining balance in annual instalments of Rs. 500 plus 12% interest on the unpaid amount. How much the tractor cost him?

If Rs. 3,750 amount to Rs. 4,620 in 3 years at simple interest. Find : (i) the rate of interest. the amount of Rs. 7,500 in 5""1/2 years at the same rate of interest.