1 A man swims downstream 40 km in 4 hours and upstream 24 km in 3 hours. Find his speed in still water. A) 9 km/hr B) 10 km/hr C) 11 km/hr D) 12 km/hr E) 13 km/hr
2 A boat covers 24 km upstream and 36 km downstream in 6 hours while it covers 36 km upstream and 24 km downstream in $6 \frac{1}{2}$ hours. The velocity of the current is : A) 1 km/hr B) 1.5 km/hr C) 2 km/hr D) 2.5 km/hr E) 3 km/hr
3 A man takes 3 hours 45 minutes to row a boat 15 km downstream of a river and 2 hours 30 minutes to cover a distance of 5 km upstream. Find the speed of the river current in km/hr. A) 1 km/hr B) 2 km/hr C) 1.5 km/hr D) 8 km/hr E) 7 km/hr
4 A man can row upstream at 7 kmph and downstream at 10 kmph. Find man's rate in still water and the rate of current. A) 1 km/hr B) 1.5 km/hr C) 2 km/hr D) 8 km/hr E) 6 km/hr
5 A man can row 18 kmph in still water. It takes him thrice as long to row up as to row down the river. Find the rate of stream. A) 7 km/hr B) 10 km/hr C) 9 km/hr D) 8 km/hr E) 9 km/hr
6 A man can row $7\frac{1}{2}$ kmph in still water. If in a river running at 1.5 km an hour, it takes him 50 minutes to row to a place and back, how far off is the place ? A) 3 km/hr B) 4 km/hr C) 5 km/hr D) 6 km/hr E) 7 km/hr
7 In a stream running at 2 kmph, a motorboat goes 6 km upstream and back again to the starting point in 33 minutes. Find the speed of the motorboat in still water. A) 2 km/hr B) 22 km/hr C) 2.2 km/hr D) 20 km/hr E) 30 km/hr
8 There is a road beside a river. Two friends started from a place A, moved to a temple situated at another place B and then returned to A again. One of them moves on a cycle at a speed of 12 km/hr, while the other sails on a boat at a speed oi 10 km/hr. If the river flows at the speed of 4 km/hr, which of the two friends wit return to place A first ? A) cyclist B) boat sailor C) together D) None of these E) Cannot be Determined
9 A streamer goes downstream from one port to another in 4 hours. It covers the same distance upstream in 5 hours. If the speed of stream is 2 km/h, the distance between the two ports is A) 50 km B) 60 km C) 70 km D) 80 km E) 75 km
10 A man rows 10 km upstream and back again to the starting point in 55 min. If the speed of stream is 2 km/h, find the speed of rowing in still water. A) 22 km/h B) 18 km/h C) 20 km/h D) 25 km/h E) 28 km/h
11 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? A) 2.4 km B) 2.5 km C) 3 km D) 3.6 km E) 4 km
12 A motor boat can travel at 10 km/h in still water .If travelled 91 km downstream in a river and then returned ,taking altogether 20 hrs .Find the rate of flow of river A) 3 km/h B) 4 km/h C) 4.5 km/h D) 5 km/h E) 5.26 km/h
Each of the questions given below consists of two statements numbered I and II given below it. Please read the questions carefully and decide whether the data provided in the statement(s) is / are sufficient to answer the given question. 13 What the speed of the man in still water? I. The man can swim a distance of $48$ kms in $6$ hours with upstream. II. The man can swim the same distance in $4$ hours with downstream. A) I alone sufficient while II alone not sufficient to answer B) II alone sufficient while I alone not sufficient to answer C) Either I or II alone sufficient to answer D) Both I and II are not sufficient to answer E) Both I and II are necessary to answer
Each of the questions given below consists of two statements numbered I and II given below it. Please read the questions carefully and decide whether the data provided in the statement(s) is / are sufficient to answer the given question. 14 A man takes a total time of $3$ hours to swim down stream from $A$ to $B$ and back from $B$ to $A$. Find the speed of the man in still water ? I. The river current speed is $1$ km/hr. II. The distance between $A$ and $B$ is $4$ km. A) I alone sufficient while II alone not sufficient to answer B) II alone sufficient while I alone not sufficient to answer C) Either I or II alone sufficient to answer D) Both I and II are not sufficient to answer E) Both I and II are necessary to answer
Each of the questions given below consists of three statements, numbered I, II and II respectively. Please read the question and the statements carefully and decide which of the statement(s) is/are necessary to answer the question. 15 Find the speed of the man in still water ? I. The downstream speed is $12$ km/hr. II. The upstream speed is $4$ km/hr. III. In a back-and-forth travel between two points, $A$ and $B$, the average speed of the man was $6$ km/hr. A) I and II only B) All I, II and III C) III, and either I or II D) Any two of the three E) None of these