Q1)-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?
Q2)-The speed of a boat in still water is 60kmph and the speed of the current is 20kmph. Find the speed downstream and upstream?
Q3)-A man can row a boat at 20 kmph in still water. If the speed of the stream is 6 kmph, what is the time taken to row a distance of 60 km downstream?
Q4)-In a stream running at 2 km/h, a motor boat goes 10 km upstream and back again to the starting point in 55 minutes. Find the speed of the motor boat in still water.
Q5)-A man can row 8 Kmph in still water. If the velocity of the current is 2 Kmph and it takes him 2 hours to row to a place and come back. How far is the place?
Q6)-A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back, how far is the place?
Q7)-A man rows to a place 48 km distant and come back in 14 hours. He finds that he can row 4 km with the stream in the same time as 3 km against the stream. The rate of the stream is:
Q8)-A man can row 10 kmph in still water and the river is running at 2 kmph. If the man takes 1 hr to row to a place and back, how far is the place??
Q9)-A boat moves upstream at the rate of 1 km in 10 minutes and downstream at the rate o 1 km in 6 minutes. The Speed of the current is :
Q10)-A man rows 750 m in 675 seconds against the stream and returns in 7 and half minutes. His rowing speed in still water is
2 : 1
3 : 2
8 : 3
None of these
Ans.- C
Q2)-The speed of a boat in still water is 60kmph and the speed of the current is 20kmph. Find the speed downstream and upstream?
35, 25 kmph
80, 40 kmph
40, 60 kmph
50, 55 kmph
Ans.- B
Q3)-A man can row a boat at 20 kmph in still water. If the speed of the stream is 6 kmph, what is the time taken to row a distance of 60 km downstream?
20/6 hours
27/2 hours
30 hours
30/13 hours
Ans.- D
Q4)-In a stream running at 2 km/h, a motor boat goes 10 km upstream and back again to the starting point in 55 minutes. Find the speed of the motor boat in still water.
22 km/h
24 km/h
20 km/h
23 km/h
Ans.- A
Q5)-A man can row 8 Kmph in still water. If the velocity of the current is 2 Kmph and it takes him 2 hours to row to a place and come back. How far is the place?
6.5 km
7.5 km
7.4 km
6.4 km
Ans.- B
Q6)-A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back, how far is the place?
2.4 km
2.5 km
3 km
3.6 km
Ans.- A
Q7)-A man rows to a place 48 km distant and come back in 14 hours. He finds that he can row 4 km with the stream in the same time as 3 km against the stream. The rate of the stream is:
1 km/hr
2 km/hr
1.5 km/hr
2.5 km/hr
Ans.- A
Q8)-A man can row 10 kmph in still water and the river is running at 2 kmph. If the man takes 1 hr to row to a place and back, how far is the place??
4.8
4.5
5.6
5
Ans.- A
Q9)-A boat moves upstream at the rate of 1 km in 10 minutes and downstream at the rate o 1 km in 6 minutes. The Speed of the current is :
1 km/h
5 km/h
2 km//h
3 km/h
Ans.- C
Q10)-A man rows 750 m in 675 seconds against the stream and returns in 7 and half minutes. His rowing speed in still water is
4 kmph
5 kmph
6 kmph
7 kmph
Ans.- B
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