Boat and Stream Practice Question and Answer
8 Q: A boat goes 75 km upstream in 3 hours and 60 km downstream in 1.5 hours. Then the speed of the boat in still water is:
2117 05f2397e1e3005114abcaf6cb
5f2397e1e3005114abcaf6cb- 165 kmphfalse
- 260 kmphfalse
- 332.5 kmphtrue
- 430 kmphfalse
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Answer : 3. "32.5 kmph "
Q: The ratio of speed of boat in still water to speed of stream is 8 : 1. It takes 4 hours by boat to cover 54 km in downstream & 42 km in upstream. Find the downstream speed of boat.
2063 0603f63a256eac5533a8f5532
603f63a256eac5533a8f5532- 125 kmphfalse
- 224 kmphfalse
- 321 kmphfalse
- 427 kmphtrue
- 523 kmphfalse
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Answer : 4. "27 kmph"
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 four times the speed of the current, then the speed of the current is:
2016 05dd62400c2282c484e4b29dc
5dd62400c2282c484e4b29dc- 11 km/hrfalse
- 22 km/hrtrue
- 34 km/hrfalse
- 43 km/hrfalse
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Answer : 2. "2 km/hr "
Q: A man goes downstream with a boat to some destination and returns upstream to his original place in 5 hours. If the speed of the boat in still water and the stream are 10 km/hr and 4 km/hr respectively, the distance of the destination from the starting place is :
1761 05f23e93f4e7e0d508b591efc
5f23e93f4e7e0d508b591efc- 121 kmtrue
- 225 kmfalse
- 316 kmfalse
- 418 kmfalse
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Answer : 1. "21 km "
Q: If the speed of a boat in still water is 20 km/hr and the speed of the current is 5 km/hr, then the time taken by the boat to travel 100 km with the current is :
1719 05f23ec4e3494c5438aa834dc
5f23ec4e3494c5438aa834dc- 14 hrtrue
- 27 hrfalse
- 32 hrfalse
- 43 hrfalse
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Answer : 1. "4 hr"
Q: A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively? 1623 05b5cc6bce4d2b4197774d88b
5b5cc6bce4d2b4197774d88b- 17:4false
- 211:4false
- 34:7false
- 48:3true
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Answer : 4. "8:3"
Explanation :
Answer: D) 8:3 Explanation: Let the speed of the boat upstream be p kmph and that of downstream be q kmph Time for upstream = 8 hrs 48 min = 845hrs Time for downstream = 4 hrs Distance in both the cases is same. => p x 845= q x 4 => 44p/5 = 4q => q = 11p/5 Now, the required ratio of Speed of boat : Speed of water current = q+p2:q-p2 => (11p/5 + p)/2 : (11p/5 - p)/2 => 8 : 3
Q: Ratio between speed of boat in still water to speed of stream is 7 : 2. If 126 km is travelled downstream in 3.5 hours then find the difference between speed of boat in still water to speed of stream(in kmph)?
1577 05df9b6329e7c624c9bfe82fd
5df9b6329e7c624c9bfe82fd- 115false
- 222false
- 324false
- 420true
- 518false
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Answer : 4. "20"
Q: Speed of a boat in still water is 6 km/hr and speed of the current is 2 km/hr. If boat takes four hours more in upstream than in the downstream to cover ‘D’ km, then find time take by boat to cover ‘D’ km in still water?
1547 062e0fd56e50b894c6f5850ee
62e0fd56e50b894c6f5850ee- 15 hours 30 minutesfalse
- 25 hours 45 minutesfalse
- 35 hours 10 minutesfalse
- 45 hours 20 minutestrue
- 55 hours 40 minutesfalse
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