21. A train passes a stationary observer in 10 seconds. If the length of the train is 200 meters, what is the speed of the train?
a) 60 km/h
b) 80 km/h
c) 72 km/h
d) 90 km/h
The correct answer is : C
22. A boat travels 24 km downstream in 2 hours and the same distance upstream in 4 hours. What is the speed of the boat in still water?
a) 6 km/h
b) 8 km/h
c) 10 km/h
d) 12 km/h
The correct answer is : B
23. A man runs 100 meters in 12 seconds. What is his speed in km/h?
a) 20 km/h
b) 25 km/h
c) 30 km/h
d) 35 km/h
The correct answer is : B
24. A person walks 4 km in 45 minutes. What is his speed in meters per second?
a) 1.33 m/s
b) 1.44 m/s
c) 1.50 m/s
d) 1.60 m/s
The correct answer is : A
25. A car takes 2 hours to travel a distance of 150 km. What is the average speed of the car?
a) 60 km/h
b) 65 km/h
c) 70 km/h
d) 75 km/h
The correct answer is : A
