A body is thrown vertically upward and it reaches 10m high. Find the velocity with which the body was thrown? (g = 9.8 m/s)

The second’s hand of a watch is 2 cm long. The velocity of its tip is

4 men or 8 women can do a piece of work in 24 days. In how many days, will 12 men and 8 women do the same work?

How many seconds will it take for a train 100 meters long moving at the rate of 15 m/sec to overtake another train 80 m long running from the opposite side at the rate of 90 km/hr?

what is a percent of b divided by b percent of a?

Answer : 1

Two pipes A and B are attached to a cistern. Pipe A can fill the cistern in 3 hours while pipe B can empty it in 9 hours. When both the pipes are opened together, find the time for filling the cistern?