Pratip started the business by investing some money. After some time, Sheela shared double by investing double the money. At the end of the year, the profit was distributed in such a way that 7 times the profit of Pratip was equal to 6 times the profit of Sheela, then after how many months did Sheela join the business.

Nihal walks with 12 km/h after every km, he takes the rest for 12 min after every kilometer. How much time will he take to cover 36 km distance.

The average marks of a student in four subjects is 75. If the student obtained 80 marks in the 5^th subject then the new average is ?

The simple interest on a sum of money is 4 / 9 of the principal and the number of years is equal to the rate percent per annum. The rate per annum is 

8 men and 4 women together can complete a piece of work in 6 days. Work done by a man in one day is double the work done by a woman in one day. If 8 men and 4 women started working and after 2 days, 4 men left and 4 new women joined, in how many more days will the work be completed? 

The sum of 17 consecutive numbers is 289. The sum of another 10 consecutive numbers, whose first term is 5 more than the average of the first set of consecutive numbers is:

Three friends Naimish, Ranveer and Arjun together started a business by investing Rs.250, Rs. 400 and Rs. 300 respectively. After 4 months Naimish invested Rs. 150 more and after 6 months Ranveer withdraw Rs. 100. While after 8 months Arjun invested Rs. 200 more. At the end of the year, a profit of Rs. 1280 is obtained. Find the share of Ranveer?

If 72 men can build a wall of 280 m length in 21 days, how many men could take 18 days to build a similar type of wall of length 100 m?