150 workers were engaged to finish a piece of work in a certain number of days. Four workers dropped on the second day, four more workers dropped on third day and so on. It takes 8 more days to finish the work now, find the number of days in which the work was completed?

A semicircle is folded to make a cone. Find the height (in cm) of the cone if diameter of the semicircle is 28 cm?

The average of five consecutive number is 26, then the multiple of the first and the last number is

Find the value of $$ {\sqrt{4+\sqrt{44+\sqrt{10000}}}}$$.

Find the simple interest on a principal of Rs.1250 at the rate of 5% for a time of 219 days.

Speed of boat in upstream is 11km/hr and downstream is 23 km/hr find the speed of boat in still water?

Average of 11 number is 30. If the average of first 10 numbers is 22, then find the 11th number?

Population of a city is 7000. In next year the population is increased by 8%, then find the new population?