Shaina pays ₹15000 as rent for 3 monts. How much does she has to pay for a whole year, if the rent per month remains same?

A contract on construction job specific a penalty for delay of completion beyond a certain date as follows : Rs. 200 for the first day, Rs.250 for the second day, Rs. 300 for the third day, etc., the penalty for each succeeding day being Rs. 50 more than for the preceding day. How much money the contractor has to pay as penalty, if he has delayed the work by 30 days ?

A contract on construction job specifies a penalty for delay of completionbeyond a certain data as follows: Rs 200 for the first day , Rs250 for the second day, Rs 300 for the third day , etc., the penalty for each succeeding day being Rs50 more than for the preceding day . How much money the contractor has to pay as penalty , if he has delayed the work by 30 days ?

The family pays Rs 1000 for electricity on an average in those months in which it does not use a water heater. In the months in whih it uses a water heater, the average electricity bill is Rs 1240. The cost of using the water heater is Rs 8.00 per hour. Find the average number of hours the water heater is used in a day.

From the pair of linear equations for the following problems and find their solution by substitution method. The taxi charge in a city consist of a fixed charge together with the charge for the distance covered. For a distance of 10 km, the charge paid is Rs. 105 and for a journey of 15 km, the charge paid is Rs. 155. What are the fixed charges and the charge per km ? How much does a person have to pay for travelling a distance of 25 km ?

A part of monthly hostel charges in a college hostel are fixed and the remaining depends on the number of days one has taken food in the mess. When a studentt 'A' takes food for 25 days he has to pay Rs. 4500 where as a student B who takes food for 30 days pays Rs. 5200. Find the fixed charges per month and the cost of food per day.

From the pair of linear equations for the following problems and find their solutions by substitution method. The taxi charges in a city consist of a fixed charge together with the charge for the distance covered. For a distance of 10km the charge paid is Rs 105 and for a journey of 15km, the charge paid is Rs 155. What are the fixed charge and the charge per km? How much does a person have to pay for travelling a distance of 25km.

Fabina borrows ₹12,500 at 12% per annum for 3 years at simple interest and Radha borrows the same amount for the same time period at 10% per annum,compounded annually.Who pays more interest and by how much?

Suppose a company needs a computer for some period of time. The company can either hire a computer for Rs. 2,000 per month or buy one for Rs 25,000. If the company has to use the computer for a long period, the company will pay such a high rent, that buying a computer has to use the computer will be cheaper. Find the number of months beyond which it will be cheaper to buy a computer.

A part of monthly hostel charge is fixed and the remaining depends on the number of days one has taken food in the mess. When Swati takes food for 20 days, she has to pay Rs. 3000 as hostel charges whereas Mansi who takes food for 25 days pays Rs. 3500 as hostel charges. Find the fixed charges and cost of food per day.