Let Sudhir invested Rs. 15000 at 8% simple interest. He wants to buy washing machine costing Rs. 19000 with the amount he receives. Determine the time period for which does he invest Rs. 15000 so that he get sufficient money to buy the washing machine ?

Vasudevan invested Rs 60,000 at an interest rate of 12% per annum compounded half yearly. What amount would he get after 1 year?

Aman deposited Rs 10000 in a bank at the rate of 5% simple interest annually. Find the amount in 15th year since he deposited the amount and also calculate the total amount after 20 years.

A merchant planes to sell two types of personal computers -a desktop model and a portain model that will cost Rs. 2500 and Rs. 40000 respectively. He estimates that the total montain demand of computers will not exceed 250 units. Determine the number of units of easy type of computers which the merchant should stock to get maximum profit it he does want to invest more than Rs. 70 lakhs and if his profit on the desktop model is Rs. 4500 on portable model is Rs. 5000. Make an L.P.P and solve it graphically.

In a company a man invested Rs 38000, a part of it at an annual interest of 10% and rest at a rate of 15%. If he received a total intereset of Rs 5500, how much did he invest in each plane

A merchant plans to sell two types of personal computers – a desktop model and a portable model that will cost Rs 25000 and Rs 40000 respectively. He estimates that the total monthly demand of computers will not exceed 250 units. Determine the number of units of each type of computers which the merchant should stock to get maximum profit if he does not want to invest more than Rs 70 lakhs and if his profit on the desktop model is Rs 4500 and on portable model is Rs 5000.

A furniture dealer deals in only two items tables chairs. He has Rs 5000 to invest and a space to store at most 60 pieces. A table costs him Rs 250 and a chair Rs 50. He can sell a table at a profit of Rs 50 and a chair at a profit of Rs 15. Assuming that he can sell all the items that he buys, how should he invest his money in order that he may maximize his profit?