Question

A swimming pool is 50 metres long . a boy can swim across the length and then returns to his starting position in 5 minutes . what is his swimming speed in kilometre per hour?

Answer 1

Speed= Distance/Time

Given that Distance=50 meters
therefore Total Distance Covered=50*2=100 meters

also given that Time taken = 5 minutes
therefore Total Time taken = 5*2=10 minutes

therefore

Speed=100/10
=>10 meters per minute

Speed in kilometres per hour
=>10*60=600 meters per hour
=>0.6 km per hour