A carpenter charged Rs. 2500 for making a bed. The cost of materials used is Rs. 1100 and the labour charges are Rs. 200/hr. For how many hours did the carpenter work?

A passenger is charged Rs. 2250 for a cab. The cab owner charge Rs. 500 /- for the 1st hour. For every other hour he charges Rs. 50 less than the previous hour. Find the number of hours for which the passenger rides the cab.

The cost of 3 dozen oranges is Rs 54 How many oranges can be purchased for Rs 24?

.An employee works in a company on a contract of 30 days on the condition that he will receive Rs.120 for each day he works and he will be fined Rs.10 for each day he is absent.If he receives Rs.2300 in all,for how many did he remain absent?

cost of 105 envelopes is Rs35. How many envelopes can be purchased for Rs 10?

A person was appointed for a 50 days job on a condition that he will be paid Rs. 12 for every working day but he will be fined Rs. 6 for every day he remains absent. After the completion of the work, he got Rs. 420. For how many days, he did not work?

If the cost of a bat is Rs 7 (3)/(4), how many bats can be purchased for Rs 69 3/4?