MCQ Subject: Time, Work, Distance, and Boat Stream

A boat travels 24 km upstream and 24 km back downstream. Its speed in still water is 12 km/h, and the stream’s speed is 4 km/h. What is the total time for the round trip?

A boat travels 24 km downstream in 2 hours and 30 km upstream in 3 hours. What is the speed of the boat in still water?