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31). The speed of the boat in still water is 24 kmph and the speed of the stream is 4 km / h. The time taken by the boat to travel from A to B downstream is 36 minutes less than the time taken by the same boat to travel from B to C upstream. If the distance between A and B is 4 km more than the distance between B and C, what is the distance between A and B ?
A). 112 km
B). 140km
C). 56 km
D). 84 km
32). A certain sum is divided among A, B and C in such a way that A gets Rs. 40 more than the \( \Large \frac{1}{2} \) of the sum, B gets Rs. 120 less than \( \Large \frac{3}{8} \)th of the sum and C gets Rs. 200. What is the total sum ?
A). Rs. 1100
B). Rs. 850
C). Rs. 960
D). Rs. 1200
33). The respective ratio between speed of the boat upstream and speed of the boat downstream is 3 : 4. What is the speed of the boat in still water if it covers 70 km downstream in 3 hours 30 minutes? (in km/h)
A). 18
B). 18.5
C). 17
D). 17.5
34). A tank has two inlets : A and B. A alone takes 2 hours and B alone takes 3 hours to fill the empty tank completely when there is no leakage. A leakage was caused which would empty the full tank completely in 'x' hours when no inlet is open. Now, when only inlet A was opened, it took 3 hours to fill the empty tank completely. How much time will B alone take to fill the empty tank completely ? (in hours)
A). 4.5
B). 7.5
C). 3
D). 6
35). Time taken by a boat in going upstream a certain distance is twice the time taken in going the same distance downstream. Find the speed of boat upstream if it covers 20 km downstream in 1 hour 40 minutes.
A). 6 kmph
B). 7 kmph
C). 6.5 kmph
D). 7.2 kmph


36). The time taken by a boat to travel a distance downstream is half the time taken by it to travel the same distance upstream. What is the speed of the boat downstream if it travels 7.5 km upstream in 1 hour 30 minutes ? (in km/h)
A). 7.5
B). 5
C). 9
D). 10
37). Pipe A and B can fill a tank in 10 hours and 8 hours respectively. After certain time, pipe A was closed. It took a total of 6 hours to fill the tank completely. For how many hours did pipe A work?
A). \( \Large 4 \frac{1}{4} \ hours \)
B). \( \Large 2 \frac{1}{2} \ hours \)
C). \( \Large 3 \frac{1}{3} \ hours \)
D). \( \Large 5 \frac{1}{3} \ hours \)
38). A man takes 2.2 times as long to row a distance upstream as to row the same distance downstream. If he can row 55 km downstream in 2 hours 30 minutes. what is the speed of the boat in still water ? (in km/ h)
A). 40
B). 8
C). 16
D). 24
39). The respective ratio between speed of the boat upstream and speed of the boat downstream is 3 : 4. What is the speed of the boat in still water if it covers 70 km downstream in 3 hours 30 minutes? (in km/ h)
A). 18
B). 18.5
C). 17
D). 17.5
40). A tank has two inlets : A and B. A alone takes 2 hours and B alone takes 3 hours to fill the empty tank completely when there is no leakage. A leakage was caused which would empty the full tank completely in 'x' hours when no inlet is open. Now, when only inlet A was opened, it took 3 hours to fill the empty tank completely. How much time will B alone take to fill the empty tank completely ? (in hours)
A). 4.5
B). 7.5
C). 3
D). 6
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