one swimmer in a relay race has a 0.50s lead and is swimming at a constant speed of 4.0m/s. He...

one swimmer in a relay race has a 0.50s lead and is swimming at a constant speed of 4.0m/s. He has a 50. m to swim before reaching the end of the pool. A second swimmer moves in the same direction as the leader. What constant speed must the second swimmer have in order to catch up to the leader at the end of the pool?