Trains, Boats and Streams

Question 1

A boatman takes 3 hours 45 minutes to travel 15 km downstream and takes 2 hours 30 minutes to travel 5 km upstream of a river. What is the speed of the stream of the river in km/h?

• 2 km/h
• 1 km/h
• 6 km/h
• 4 km/h

Question 2

A speedboat runs 6 km upstream in a river and comes back to the starting point in 33 minutes. The stream of the river is running at 2 km/hr. What is the speed of speedboat in still water?

• 25 km/h
• 21 km/h
• 26 km/h
• 22 km/h

Question 3

A boat runs at the speed of 13 km/h in still water. If the speed of the stream is 4 km/h, how much time will it take to go 68 km downstream?

• 5 h
• 4 h
• 6 h
• 3 h

Question 4

Peter\'s speedboat run at a speed of 9 km/h in still water. He rows to a place at a distance of 105 km and comes back to the starting point. If the speed of stream is 1.5 km/h, find out the time taken by Peter.

• 24 h
• 21 h
• 23 h
• 22 h

Question 5

A motorboat crosses a certain distance in 1 hour and comes back in 1½ hours. If the stream is running at 3 km/h, find out the speed of motorboat in still water.

• 10 km/h
• 15 km/h
• 12 km/h
• None of these

Question 6

A train crosses a pole in 20 sec. If the length of train is 500 meters, what is the speed of the train?

• 27 m/s
• 20 m/s
• 25 m/s
• 30 m/s

Question 7

A train crosses a pole in 10 sec. If the length of train is 100 meters, what is the speed of the train in Kmph?

• 34
• 36
• 30
• 32

Question 8

A train is running at a speed of 100Kmph. A car is running on road parallel to the train’s track at a speed of 20 Kmph in the same direction as of train. How much time will it take to cross the car if the length of the train is 100 meters?

• 5 sec
• 4 sec
• 5.5 sec
• 4.5 sec

Question 9

A train is running at a speed of 100Kmph. A car is running on road parallel to the train’s track at a speed of 20 Kmph opposite to train. How much time will it take to cross the car if the length of the train is 100 meters?

• 5 sec
• 4 sec
• 3 sec
• 3.5 sec

Question 10

What is the length of the platform, if a train running at a speed of 90 m/sec and length is 80 meters, crosses the platform in 2 sec?

• 120 m
• 150 m
• 125 m
• 100 m