A man rides his vehicle at the rate of 36 km/hr but stops for 12 minutes, to change parts at the end of every 14^th  km,what will be the timed taken to cover a distance of 90 km?

The average of 24 number is 65. The average of first 11 number is 67 and the average of last 10 number is 70. If the 12^th Number is 13 less than the 13^th number , and the 14^th number is  one more than the 13^th number, then the average of 12^th and 14^th number is:

A square pyramid with side 10 cm has a volume of 400 cm³. Find the total surface area of the pyramid.

If x is the mean proportional between 20 and 5 and y is the third proportional to 16 and 64, then find the value of x/y. 

A , B, and C together can finish a task in 12 days. A is twice as productive as B and C alone can do the task in 36 days. In how many days can A and B do the task if C goes on leave? 

In a business A and B gained some amount in a certain ratio. B and C received the profit in the ratio as that of A and B. If A received ₹ 6,400 and C received ₹ 10,000. Find the share of B 

A policeman starts to chase a thief. When the thief goes 10 steps the policeman moves 8 steps and 5 steps of the policeman are equal to 7 steps of the thief. The ratio of the speeds of the policeman and the thief is: 

A person bought pens at 25 for a rupee and sold at 15 for a rupee. What is his profit percentage?