Boats and Streams : Aptitude Questions and Answers

Q41. A boat whose speed in still water is 9 kmph, goes 12 km downstream and comes back in 3 hrs. Find the speed of the stream?

A. 3 kmph

B. 1 kmph

C. 4 kmph

D. 5 kmph

Q42. A boat while travelling upstream covers a distance of 29 km at the speed of 6 km/h, whereas while travelling downstream it covers the same distance at a speed of 12 km/h. What is the speed of the boat in still water?

A. 9 kmph

B. 11 kmph

C. 8 kmph

D. 6 kmph

Q43. A boat travels 72 km downstream in 8 hours and 84 km upstream in 12 hours. Find the speed of the boat in still water and the speed of the water current ?

A. 7 and 2 kmph

B. 9 and 3 kmph

C. 6 and 7 kmph

D. 8 and 1 kmph

Q44. A boatman can row 3 km against the stream in 20 minutes and return in 18 minutes. Find the rate of current ?

A. 1/2 kmph

B. 2/3 kmph

C. 1/4 kmph

D. 1/3 kmph

Q45. A boatman can row 96 km downstream in 8 hr. If the speed of the current is 4 km/hr, then find in what time he will be able to cover 8 km upstream ?

A. 1 hrs

B. 2 hrs

C. 1.5 hrs

D. 2.5 hrs

Q46. A man rows his boat 60 km downstream and 30 km upstream taking 3 hrs each time. Find the speed of the stream ?

A. 45 kmph

B. 10 kmph

C. 5 kmph

D. 15 kmph

Q47. A man swims downstream 72 km and upstream 45 km taking 9 hours each time; what is the speed of the current  ?

A. 1.5 kmph

B. 2 kmph

C. 3.2 kmph

D. 1 kmph

Q48. A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively?

A. 8:3

B. 11:4

C. 7:4

D. 4:7

Q49. A man can row 8 kmh in still water. If the river is running at 2 kmh, it takes 4 hrs more upstream than to go downstream for the same distance. Then the distance is given by

A. 32 kms

B. 60 kms

C. 45 kms

D. 54 kms

Q50. A man goes down stream with a boat to some destination and returns upstream to his original place in 5 hours. If the speed of the boat in still water and the strean are 10km/hr and 14km/hr respectively, the distance of the destination from the string place is 

A. 21 km

B. 16 km

C. 25 km

D. 18 km