Boat and Stream Practice Question and Answer
8Q: 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? 1883 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: A boat covers 35 km downstream in 2 h and covers the same distance upstream in 7 h. Find the speed (in km/h) of the boat in still water.
1843 064a541a5c4e3d04ca162e184
64a541a5c4e3d04ca162e184- 111.25true
- 228.75false
- 318.25false
- 410.55false
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Answer : 1. "11.25 "
Q: In a river the distance between two points is 80 km. A boat which rows 13 km/h in still water goes downstream from the first point to the second and returns upstream to starting point in 13 hrs., then find the speed of current.
1746 061555b3cffe69f11b0d317f4
61555b3cffe69f11b0d317f4- 15 km / hfalse
- 23 km / htrue
- 32 km / hfalse
- 4None of thesefalse
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Answer : 2. "3 km / h "
Q: A boat running downstreams covers a distance of 30 kms in 2 hours. While coming back the boat takes 6 hours to cover the same distance. If the speed of the current is half that of the boat, what is the speed of that boat in kmph?
1738 05da3fe99d691092704739eeb
5da3fe99d691092704739eeb- 115false
- 25false
- 310true
- 4Cannot be determinedfalse
- 5None of thesefalse
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Answer : 3. "10"
Q: A boat goes 12 km downstream and comes back to the starting point in 3 hours. If the speed of the current is 3 km/hr, then the speed (in km/hr) of the boat in still water is :
1737 05f23df6d3494c5438aa7f0c2
5f23df6d3494c5438aa7f0c2- 18 km/ hfalse
- 26 km/ hfalse
- 312 km/ hfalse
- 49 km/ htrue
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Answer : 4. "9 km/ h "
Q: A boat goes 30 km upstream and 44 km downstream in 10 hours. In 13 hours, it can go 40 km upstream and 55 km downstream. The speed of the boat in still water is.
1717 05f238fca4e7e0d508b5799c8
5f238fca4e7e0d508b5799c8- 18 km / htrue
- 23 km / hfalse
- 34 km / hfalse
- 4None of thesefalse
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Answer : 1. "8 km / h "
Q: A person swims a distance of 28 km. in the direction of stream in 5 hours and a distance of 13 km. in 5 hours against the stream. What is the velocity of the stream?
1649 06099114ff738a51c29aa3141
6099114ff738a51c29aa3141- 12.5 km./hr.false
- 21.8 km./hr.false
- 32 km./hr.false
- 41.5 km./hr.true
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Answer : 4. "1.5 km./hr."
Q: Speed of boat in upstream is 11km/hr and downstream is 23 km/hr find the speed of boat in still water?
1622 0601a4d68c12de45b38e1ef91
601a4d68c12de45b38e1ef91- 115 km/hrfalse
- 217 km/hrtrue
- 39 km/hrfalse
- 48 km/hrfalse
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