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 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
3 The speed of a boat in still water is 8 km/hr. If it can travel 20 km down stream at the same time as it can travel 12 km upstream, the rate of stream (in km/hr) is A) 2 B) 1 C) 4 D) 3 E) 5
4 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
5 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
6 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.
7 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
8 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
9 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
10 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
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 A man takes twice as long to row a distance against the stream as to row the same distance in favour of the stream. The ratio of the speed of the boat (in still water) and the stream is A) 2 : 1 B) 3 : 1 C) 3 : 2 D) 4 : 2 E) None of these
13 A boat takes 19 h for travelling downstream from point A to point B and coming back to point C, midway between A and B. If velocity of the stream is 4 km/h and the speed of the boat in still water is 14 km/h. What is the distance between A and B ? A) 160 km B) 180 km C) 200 km D) 220 km E) 240 km
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 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
