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:
2135 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.
2074 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:
2038 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 :
1898 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 :
1738 05f23ec4e3494c5438aa834dc
5f23ec4e3494c5438aa834dc- 14 hrtrue
- 27 hrfalse
- 32 hrfalse
- 43 hrfalse
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Answer : 1. "4 hr"
Q: The water in a river is flowing at a rate of 4 km/hr. If the width and depth of the river are 8m and 4m respectively, then how much water will enter the sea in 15 minutes?
1651 05f239698e3005114abcaecb8
5f239698e3005114abcaecb8- 1false
- 2true
- 3false
- 4false
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Answer : 2. "
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? 1642 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)?
1586 05df9b6329e7c624c9bfe82fd
5df9b6329e7c624c9bfe82fd- 115false
- 222false
- 324false
- 420true
- 518false
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