A boat is rowed downstream at 15.5km/hr and upstream at 8.5 km/hr. The speed of the stream is________?

A steamer goes downstream from one port to another in 4 hours, it covers the same distance upstream in 5 hours. If the speed of the stream is 2km/hr,the distance between the two parts is_______?

A. 50km

B. 60km

C. 70km

D. 80 km

The speed of a motor boat is that of the current of water as 36:5. The boat goes along with the current in 5 hours 10 min, it will come back in_______?

A. 5 hours 50 min

B. 6 hours

C. 6 hours 50 min

D. 12 hours 10 min

The speed of a boat in still water is 5 km/hr, it can go 30km upstream and return downstream to the original point in 4 hours 30 min. The speed of the stream is_______?

A. 5km/hr

B. 8 km/hr

C. 10 km/hr

D. 15 km/hr

A boat covers a distance of 30 km in 2 ½ hours running downstream while returning it covers the same distance in 3 ¾ hours. What is the speed of the boat in still water?

A. 8km/hr

B. 12km/hr

C. 14 km/hr

D. 15 km/hr

E. None of these

A boat goes 24 km downstream in 10 hours, it takes 2 hours more to cover the same distance against the stream. What is the speed of the boat in still water?

A. 2km/hr

B. 2.8 km/hr

C. 4 km/hr

D. 4.2 km/hr

E. None of these