If selling price is doubled, The profit triples. Find the profit percent.

The ratio of three numbers is 3 : 4 : 5 and the sum of their squares is 1250. The sum of the numbers is :

X and Y invested in a business. They earned some profit which they divided in the ratio of 2 : 3. If X investe...

If 5 men and 9 women can do a piece of work in 19 days, then in how many days will 3 men and 6 women do the sa...

A person travels form P to Q at a speed of 40 kmph and returns by increasing his speed by 50%. What is the ave...

A train 360 m long is running at a speed of 45 km/hour. In what time will it pass a bridge 140 m long?

The speed of a boat in still water is 10 km/hr. If it can travel 26 km downstream and 14 km upstream in the sa...