## Amar Sir is teaching live on Unacademy Plus

A renowned faculty of Objective Mathematics, Personal Interview/GD General Studies, Indian History An experience of 24 yrs of teaching at Jamshedpur, Ranchi, Bokaro [Jharkhand], Sambalpur [Odisha]. Thousands of successful students in Bank/SSC/Railway/Civil Services unacade 108 1146 156K Courses Lessons Followers Life time views 980K Amar Sir "Math Dikhta Hai" Follow me on Unacademy: https://unacademy.com/user/amar.singh963

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10 -3 : 7 (3) 2 2

11. Q.: A man rows to a place 35 km in distance and back in 10 hours 30 minutes. He found that he could row 5 km with the stream in the same time as he can row 4 km against the stream. Find the rate of flow of the stream. (a) 1 km/h (b) 0.5 km/h (c) 0.75 km/h (d) 1.5 km/h 2 2 35, 35-21 "gK 2 2 2

12. Q.: A boat goes 6 km/h in still water, but takes thrice as much time in going the same distance against the current. The speed of the current (in km/h) i:s (a) 4 (b)5 (c) 3 (d) 2 2 3

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: Speed (x:y): 2

14. Q.: A man can row 30 km downstream and return in a total of 8 hours. If the speed of the boat in still water is 4 times the speed of the current, then the speed of the current is: (a) 1 km/h (b) 2 km/h (c) 4 km/h (d) 3 km/h Ti me (Dun: up) - 3:s ) 30 Km (4) .

14. Q.: A man can row 30 km downstream and return in a total of 8 hours. If the speed of the boat in still water is 4 times the speed of the current, then the speed of the current is: (a) 1 km/h (b) 2 km/h (c) 4 km/h (d) 3 km/h JO y: 6 Km/ 10- 6 2 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 2 Speed (x:v)> u: V (2+1 (2 3:1 2 2= 2.5km/h (C) Aws 75Km/h

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 Spudlx:y) il

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 02

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

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 IOhTA Down UP

(1) Q : Ahoat covers 2u Km upatrom and 36 down- covers 36 Km upstream stream in 6 hours , wh and 24 Km downstream m 6 houm.TheaPadotcumenth. (a) 1 km/h ( ) 2 km/h (C) I S km/h (d) 2 . S Km/h (2) o: A />wimmer /> w imn from a point 'A,against a current cunent for mext s minuts and comen to Ihe point'g' d) O 6 (a) 12 ()9 CC) d) 6 (M) o: The Pad et lhe curr ent in 5 Km/h. A motenhoat goes 10 Km upteam and back again to lhe ntarting point in 5o (a) 20 CA) 26 CC 2S d28

(1) Q . Ahoat coven 2u Krn wpat e9m and 36 krn down. trea m m 6 hows, wh it covers 36 Krn upstream and 24 em down:tream m 6 hown Theapud cument . (1) 3 +24-6 09 % 24 (A)

2 8: A pwimmen swima from a point 'A'agaimst a cunent cuar ent for me t 5 mmutin and comes to lhe point's (a) oy () 0 C) 1d) 0 6 Smin_ 3 down SC - 60 6 0 0 6

(3) 0 A boat goen 12 km uptream and comr hack toamg point in 3 hours. If Perd INE cunrunt. 3 Km/h, INE (a) 12 C)9C) 3 () 6 UP down 2 4 (ue3) (u+3) (u3)(u+3 2. (a) 12 3X3 (4) gue,Ange - (d) 6 X