If one pipe A can fill a tank in 20 minutes, then 5 pipes, each of 20% efficiency of A, can fill the tank in:

A and B completed a work together in 5 days. had A worked at twice the speed and B at half the speed, it would have take…

A can do a certain work in 12 days. B is 60% more efficient then A. How many days will B and A together take to do the s…

A and B together can complete a job in 8 days. Both B and C, working alone can finish the same job in 12 days, A and B c…

There is a group of 5 boys and 2 girls. The two groups working together can do four times as much work as a boy and a gi…

A can complete a piece of work in 36 days, B in 54 days and C in 72 days. All the three began the work the work together…

A does 20% less work than B. If A can complete a piece of work in $$7\frac{1}{2}$$ hours, then B can do it in ?

The charges per hour of internet surfing is increased by 25% then find the percentage decrease in the time period of sur…