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10 - 3 : 7 2 Rebultant 2

1. Q.: A motor boat in still water travels at a speed of 36 km/h. It goes 56 km upstream in 1 hour 45 minutes. The time taken by it to cover the same distance down the stream will be: (a) 2 hours 25 minutes (b) 3 hours (c) 1 hour 24 minutes (d) 2 hours 21 minutes S 6 Km 13 h 56Km Downhtream time-km

2. Q.: A boat rows 1 km in 5 minutes, along the stream and 6 km in 1 hour against the stream. The speed of the stream is: (a) 3 km/h (b) 6 km/h (c) 10 km/h (d) 12 km/h 5min Km downstream 3 Kmlh 2. 2.

3. Q.: The speed of a boat in still water is 10 km/h. It covers (upstream) a distance of 45 km in 6 hours. The speed (in km/h) of the stream is: (a) 2.5 (b) 3 (c) 3.5 (d) 4 I5. 2: v= u-y -10-75 2.5 Km/h (a)

4. Q.: A man rows 40 km upstream in 8 hours and a distance of 36 km downstream in 6 hours. Then, the speed of stream is: (a) 0.5 km/h (b) 1.5 km/h (c) 1 km/h (d) 3 km/h 4o Km g hours 3.6 Km 6haua 5 Km/h 2 2. 0.5 Km/h

5. Q.: A boat goes 100 km downstream in 10 hours and 75 km upstream in 15 hours, then the speed of stream is: (a) 2 km/h (b) 2.5 km/h (c) 3 km/h (d) 3.5 km/h 10Km/h lo h 2 2. 15 h (6) Am

6. Q.: A boy can swim in still water at a speed of 10 km/h. If the speed of the current would have been 5 km/h, then the boy could swim 60 km: (a) Upstream in 4 hours (b) downstream in 12 hours (b) (c) upstream in 6 hours (d) downstream in 4 hours 5%n/h 60 Kr-

7. Q.: A person can row 1 km upstream in 10 minutes and downstream in 4 minutes. What is the speed of stream? (a) 4.5 km/h (b) 4 km/h (c) 9 km/h (d) 5.6 km/h 10 min 1 km 2 2. 2 --> 2:15 ) (a) An 60 min

8. Q.: A boat goes 20 km downstream in 1 hour and the same distance upstream in 2 hours. The speed of the boat in still water is: (a) 15 km/h (b) 10 km/h (c) 5 km/h (d) 7.5 km/h 20 Km 2 h /h x 20 Km/h 10 km 2 2 2 (a) Ans

10. Q.: A boat takes half time in moving a certain distance downstream than upstream. The ratio of the speed of the boat in still water and that of the current is: (c)4:3(d) 3:1 Downntteam Upstream Time 2 Spend (x:y)

13. Q.: In a fixed time, a boy swims double the distance along the current that he swims against the current. If the speed of the current is 3 km/h, then the speed of the boy in still water is: (a) 6 km/h (b) 9 km/h (c) 10 km/h (d) 12 km/h Downntream:Upotream Dintance: 2 Speed (x:y): 2

15. Q.: A person can row 7.5 km/h in still water and he finds that it takes him twice as long to row up as to row down the river. The speed of the current is: (a) 2 km/h (b) 3 km/h (c) 2.5 km/h (d) 3.5 km/h DownptreamUpt ream 2 Speed (x:v)> 2 ILI (C)Aws

16. Q.: A motor boat covers a certain distance downstream in a river in 3 hours. It covers the same distance upstream in 3 hours and a half. If the speed of water is 1.5 km/h, then the speed of the boat in still water is: (a) 17 km/h (b) 19.5 km/h (c) 17.5 km/h (d) 19 km/h Downniream: Upntream : 3Shx 7 6 6 Spudx:)

17. Q.: A man can row at 5 km/h in still water. If the velocity of current is 1 km/h and it takes him 1 hour to row to a place and come back, then how far is the place? (a) 2.5 km/h (b) 3 km/h(c) 2.4 km/h (d) 3.6 km/h 6

18. Q.: The speed of a boat in still water is 6 km/h and the speed of the stream is 1.5 km/h. A man rows to a place at a distance of 22.5 km and comes back to the starting point. The total time taken by him is: (a) 10 hours (b) 4 hours 10 minutes (c) 6 hours 10 minutes (d) 8 hours Down

19. Question: A man can row at a speed of 5 km/hr in still water to a certain upstream point and back to the starting point in a river which flows at 2 km/hr. Find his average speed for total journey. (a) 9 km/hr (b) 4.2 km/hr (c) 8 km/hr (d) 6 km/hr (e)None of these Solution X 5+2-7 km/h, and Y - 5-2-3 km/h 2xY XtY 2x7x3 4.2 km/h Ans Average Speed 7+3

21. Ques: P, Q and R are the three towns on a river which flows uniformly are equidistant from P and R. I row from P to Q and back in 10 hrs and I can row from P to R in 4 hrs. Compare the speed of my boat in still water with that of the river. (a) 5:3 (b) 4: 3 (c) 6:5 (d) 7:3 (e) None of these 2hin Di IOhTA 10-2 ghin Down UP u:V-14+1):(4-1)/2 :3

1a: A boat cove 2u Km upstresm and 36 km down- tream m 6 hours , while it covers 36 Krn upstream and 24 Km downstream m 6 hours .Theapadotcumenth. (2) 8: A swimmer wim from a point 'A'azaimst a cwment cunent for ment s minut and comer to lhe poimt 'g' d) O 6 (3) 9: A boat aen 12 Km uptseam and come hack to lhe tartin point im 3 hours If apad INE eunrunt . 3 Km/h, lhen (a) 12 ()9 CC) d) 6 (H) O. The Pend et lh cunn ent n 5 Km/h. A motenhoat goes 10 Km upotzeam and back again to lha ntarting point in 5o minuler . Then Peed (ua km/h) INE emotenhoat in stiu watan: (a) 20 CA) 26 CC 2S d2 8

(1) Q : Ahoat coven 2u Krn upat e9m and 36 km down- in 6 houm, while covers 36 Krn upstream and 24 Km downstream m 6 houm.Theapuercumenth. (1 6 2 G 10 U = 2= 10 Km/4

(2) O: A ^wimmer ^ 'ma from a point A'agamat a current aaainnt a cument fox 5 mimutar and lhenAwim backward in favo hc cuarent for me t 5 minutes and comen to lhe point's Smin_ 3 60 60 0 6

(3)0: A boat goen 12 km uptseam and come) hack to lhetaring Point iw 3 hou I p Ecunrunt is 3 m/h, Ihe (a) 12 C)9C) 3 () 6 C3) P down /2 u-3 2 G4 (u3 (u+3) (a) 12 2. - (d) 6 X

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