## Practice Problems [Quiz] – Boats and Streams

#### [Boats and Streams] - Quiz 1

Q.1:

A man's speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current is:

 A) 8.5 km/hr B) 9 km/hr C) 10 km/hr D) 12.5 km/hr
Q.2:

A man can row upstream at 16 km/hr and downstream at 24 km/hr. Find the speed of the current.

 A) 4 kmph B) 6 kmph C) 5 kmph D) 3 kmph
Q.3:

A man can row upstream at 12 km/hr and downstream at 18 km/hr. The man's rowing speed in still water is

list1=[8,0,9,5]

print(list1[::-1])

 A) 15 km/hr B) 5 km/hr C) 3 km/hr D) 10 km/hr
Q.4:

A man rows 24 km upstream in 6 hours and a distance of 35 km downstream in 7 hours. Then the speed of the man in still water is

 A) 4.5 km/hr B)4 km/hr C) 5 km/hr D) 5.5 km/hr
Q.5:

Speed of a man in still water is 5 km/hr and the river is running at 3km/hr. The total time taken to go to a place and come back is 10 hours. What is the distance travelled?

 A) 10 kms B) 16 kms C) 24 kms D) 32 kms
Q.6:

A boat whose speed in 20 km/hr in still water goes 40 km downstream and comes back in a total of 5 hours. The approx. speed of the stream (in km/hr) is:

 A) 6 km/hr B) 9 km/hr C) 12 km/hr D) 16 km/hr
Q.7:

A boat covers a certain distance downstream in 2 hour, while it comes back in 2 1/2 hours. If the speed of the stream be 5 kmph, what is the speed of the boat in still water?

 A) 40 kmph B) 30 kmph C) 35 kmph D) 45 kmph
Q.8:

What will be the result after the execution of above Python code ?

 A) 8 kmph B) 6 kmph C) 7.5 kmph D) 5.5 kmph
Q.9:

A man can row 30 km upstream in 6 hours. If the speed of the man in still water is 6 km/hr, find how much he can row downstream in 10 hours.

 A) 70 km B) 140 km C) 200 km D) 250 km
Q.10:

A boat goes 4 km against the current of the stream in 1 hour and goes 1 km along the current in 10 minutes. How long will it take to go 15 km in stationary water?

 A) 2 hours B) 2 hours 15 mins C) 3 hours D) 3 hours 30 mins

#### [Boats and Streams] - Quiz 2

Q.1:

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) 1.5 hrs B) 1 hrs C) 2.5 hrs D) 2 hrs
Q.2:

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

 A) 5 kmph B) 10 kmph C) 15 kmph D) 5 kmph
Q.3:

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) 54 kms B) 32 kms C) 45 kms D) 60 kms
Q.4:

A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream

 A) 2 hours B) 3 hours C) 4 hours D) 5 hours
Q.5:

In one hour, a boat goes 11 km/hr along the stream and 5 km/hr against the stream. The speed of the boat in still water (in km/hr) is:

 A) 3 km/hr B) 5 km/hr C) 8 km/hr D) 9 km/hr
Q.6:

A boat running downstream covers a distance of 16 km in 2 hours while for covering the same distance upstream, it takes 4 hours. What is the speed of the boat in still water?

 A) 4 km/hr B) 6 km/hr C) 8 km/hr D) Data inadequate
Q.7:

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

 A) 1 kmph B) 3.2 kmph C) 1.5 kmph D) 2 kmph
Q.8:

In one hour, a boat goes 12 km/hr along the stream and 6 km/hr against the stream. The speed of the boat in still water (in km/hr) is:

 A) 9 B) 8 C) 7 D) 7.5
Q.9:

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) 6 kmph B) 8 kmph C) 9 kmph D) 11 kmph
Q.10:

A person can row 8 1/2 km an hour in still water and he finds that it takes him twice as long to row up as to row down the river. The speed of the stream ?

 A) 1.78 kmph B) 2.35 kmph C) 2.83 kmph D) 3.15 kmph

#### [Boats and Streams] - Quiz 3

Q.1:

Find the speed of stream if a boat covers 36 km in downstream in 6 hours which is 3 hours less in covering the same distance in upstream?

 A) 1.5 kmph B) 1 kmph C) 0.75 kmph D) 0.5 kmph
Q.2:

A woman can row upstream at 16 km/hr and downstream at 26 km/hr. What is the speed of the stream?

 A) 5 km/hr B) 2 km/hr C) 4.5 km/hr D) 21 km/hr
Q.3:

A boat is moving 2 km against the current of the stream in 1 hour and moves 1 km in the direction of the current in 10 minutes. How long will it take the boat to go 5 km in stationary water?

 A) 1 hr 20 minutes B) 1 hr 30 minutes C) 1 hr 15 minutes D) 30 minutes
Q.4:

A man takes 20 minutes to row 12 km upstream which is a third more than the time he takes on his way downstream. What is his speed in still water?

 A) 41 km/hr B) 36 km/hr C) 42 km/hr D) 45 km/hr
Q.5:

How long will it take to row 20 km upstream if one can row 10 km in 10 minutes in still water and the same distance in 8 minutes with the stream?

 A) 12 min B) 13.33 min C) 24 min D) 26.67 min
Q.6:

A boatman can row 2 km against the stream in 20 minutes and return in 10 minutes. Find the rate of flow of the current.

 A) 2 km/h B) 1 km/h C) 3 km/h D) 5 km/h
Q.7:

A steamer moves with a speed of 4.5 km/h in still water to a certain upstream point and comes back to the starting point in a river which flows at 1.5 km/h. The average speed of steamer for the total journey is

 A) 12 km/h B) 10 km/h C) 6 km/h D) 4 km/h
Q.8:

A Woman’s downstream swimming rate is thrice of her upstream swimming rate. If she covers 12 km upstream in 2.5 hours, what distance she will cover in 5 hours downstream?

 A) 72 km B) 36 km C) 56 km D) 42 km
Q.9:

Choose the most appropriate answer:A boat travels upstream from B to A and downstream from A to B in 3 hours. If the speed of the boat in still water is 9 Km/h and the speed of the current is 3 Km/h, the distance between A and B is

 A) 9 km B) 10 km C) 11 km D) 12 km
Q.10:

A boat can push 1 km with stream in 10 minutes and 1 km against stream in 20 minutes. What is the rate of the vessel in still Water?

 A) 1.5 km/hr B) 3 km/hr C) 3.4 km/hr D) 4.5 km/hr.