1 A person can row a boat $d$ km upstream and the same distance downstream in 5 hours 15 minutes. Also, he can row the boat $2d $ km upstream in 7 hours. How long will it take to row the same distance $2d$ km downstream? A) 7 hours B) $7\frac{1}{3}$ hours C) $7\frac{1}{4}$ hours D) $7\frac{1}{2}$ hours E) $7\frac{1}{9}$ hours
2 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
3 The speed of a boat in still water is 10 km/hr. If it can travel 26 km downstream and 14 km upstream in the same time, the speed of the stream is : A) 2 km/hr B) 2.5 km/hr C) 3 km/hr D) 4 km/hr E) 5 km/hr
4 A boat takes 90 minutes less to travel 36 miles downstream than to travel the same distance upstream. If the speed of the boat in still water is 10 mph, the speed of the stream is : A) 2 mph B) 2.5 mph C) 3 mph D) 4 mph E) 3.5 mph
5 A man swimming in a stream which flows 1.5 kmph, finds that in a given time he can swim twice as fast with the stream as he can against it. At what rate does he swim ? A) 4 km/hr B) 4.5 km/hr C) 5 km/hr D) 5.5 km/hr E) 6 km/hr.
6 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
7 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
8 A man can row 40 km upstream and 55 km downstream in 13 hours. Also, he can row 30 km upstream and 44 km downstream in 10 hours. Find the speed of the man in still water and the speed of the current. A) 4 km/hr B) 1 km/hr C) 2 km/hr D) 3 km/hr E) 5 km/hr
9 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
10 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
11 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
12 The speed of motorboat in still water is 6 km/h. A motor boat goes 7 km upstream and back to the starting point in $2\frac{2}{5}$ hrs. The velocity of the current is A) 1.2 km/h B) 3 km/h C) 1.5km/h D) 1.3 km/h E) 1 km/h
13 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. 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
