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 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 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
5 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
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 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 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
11 A motor boat goes 15 km against the stream running at 4 km/h and back in 2 hours. The speed in km/h of the motorboat in still water is A) 16 B) 15 C) 13.5 D) 18 E) 19
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
