1 The speed of a motor boat to that of the current of water is 36 : 5. The boat goes along with the current in 5 hours 10 minutes. It will come back in A) 5 hrs 50 mts B) 6 hrs C) 6 hrs 50 mts D) 12 hrs 10 mts E) 10 hrs 10 mts
2 A boat takes half time in moving a certain distance downstream than upstream. What is the ratio between rate in still water and rate of current? A) 1 : 2 B) 3 : 1 C) 2 : 1 D) 1 : 3 E) 2 : 3
3 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
4 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
5 A motorboat, whose speed is 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. The speed of the stream (in km/hr) is : A) 4 B) 5 C) 6 D) 10 E) 11
6 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
7 A man rows to a place 48 km distant and 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 : A) 1 km/hr B) 1.5 km/hr C) 1.8 km/hr D) 3.5 km/hr E) 4.5 km/hr
8 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.
9 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
10 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
11 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
12 The speed of boat in still water is 15 km/h and the rate of current is 13 km/h. Find the distance travelled downstream in 15 min. A) 5 km B) 6 km C) 7 km D) 8 km E) 9 km
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 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. 15 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
