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A pedal boat goes 12 km upstream and 14 km downstream in 3 hours. It goes 15 km upstream and 10.5 km downstream in 3 hours 15 minutes. The speed of the boat in still water is?

(A) 8 Km/h
(B) 9 Km/h
(C) 10 Km/h
(D) 15 Km/h

If a boy rows 8 km downstream in 6 hours and 4 km upstream in 4 hours then how long will he take to cover 16 km in stationary (still) water?

(A) 08 Hours
(B) 14 Hours
(C) 16 Hours
(D) 22 Hours

A boat takes 24 hours to cover 128 km downstream and 16 hours to cover 64 km upstream. Then the speed of the boat in still water is:

(A) 8/7 Km/h
(B) 3/2 Km/h
(C) 9/5 Km/h
(D) 14/3 Km/h

At the same speed a boat travelling 50 km upstream and 78 km downstream in 16 hours. Also it can travel 70 km upstream and 104 km downstream, in 22 hours at the same speed of the stream is?

(A) 3 Km/h
(B) 4 Km/h
(C) 6 Km/h
(D) 8 Km/h

A boat covers 12 km upstream and 18 km downstream in 3 hours while it covers 18 km upstream and 12 km downstream in 3 ¼ hours the velocity of the the boat upstream and downstream?

(A) 8,12
(B) 8,14
(C) 6,12
(D) 6,16

A boat takes 27 hours to travel a distance upstream and takes 9 hours to travel the same distance downstream. If the speed of the boat in still water is 12km/hr, then what is the velocity of the stream?

(A) 3 Km/h
(B) 4 Km/h
(C) 5 Km/h
(D) 6 Km/h

A boat takes 38 hrs for travelling downstream from point p to point q and coming back to a point r midway between p and q. If the velocity of the stream is 8 km/hr and the speed of the boat in still water is 28 km/hr. What is the distance between p and q?

(A) 450 KM
(B) 510 KM
(C) 640 KM
(D) 720 KM

A train overtakes two girls walking along a railway track. The first girl walks at 9 km/hr. The other girl walks at 10.8 km/hr. The train needs 16.8 and 17 seconds respectively to overtake them. What is the speed of the train if both the girls are walking in the same direction as the train?

(A) 23 m/s
(B) 34 m/s
(C) 45 m/s
(D) 50 m/s

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