Boats and Streams Problem Practice Question and Answer
8 Q: A boat can row 15 km per hour downstream and 9 km per hour upstream. The speed (in km/hour) of the boat in still water is:
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639c92e14eaee21296c2cb05- 18false
- 210false
- 312true
- 415false
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Answer : 3. "12"
Q: Speed of current is 10% of speed of boat in still water and the time taken by the boat to cover X km in downstream is 100% more than time taken by the boat to cover (X-45) km in upstream. Find the value of X?
520 061c20847dc4f51660a437e64
61c20847dc4f51660a437e64- 160 kmfalse
- 287 kmfalse
- 399 kmtrue
- 4108 kmfalse
- 590 kmfalse
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Answer : 3. "99 km"
Q: A boat running upstream takes 7 hours and 40 minutes to cover a certain distance while it takes 5 hours to cover the same distance downstream. What is the ratio between the speed of the current and speed of the boat respectively?
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60f7d8563ca0726dff350803- 113: 4false
- 217: 4false
- 319: 4false
- 44: 19true
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Answer : 4. "4: 19 "
Q: A person rows a distance of $$ {3{3\over4}{ \ km}}$$ upstream in $$ {1{1\over 2}{\ hours}}$$ and a distance of 13 km downstream in 2 hours. How much time ( in hours) will the person take to row a distance of 90 km in still water?
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60532282528a962d2e42e297- 118false
- 224false
- 320true
- 415false
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Answer : 3. "20"
Q: A motorboat covers a certain distance downstream in a river in 3 hours. It covers the same distance upstream in 3 and half an hour. If the speed of the water is 1.5 km / h, then the speed of the boat in still water is:
857 05f23dd8b1436461f6a2f3713
5f23dd8b1436461f6a2f3713- 119.5 km/htrue
- 219 km/hfalse
- 317 km/hfalse
- 417.5 km/hfalse
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Answer : 1. "19.5 km/h"
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 :
986 05f23df6d3494c5438aa7f0c2
5f23df6d3494c5438aa7f0c2- 18 km/ hfalse
- 26 km/ hfalse
- 312 km/ hfalse
- 49 km/ htrue
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Answer : 4. "9 km/ h "
Q: The distance between AB is 174 km. Two Boats Start moving towards each other at the same time at points A and B respectively. One in upstream and other in downstream. If their speed in still water is 9.6 km/ hr. and 19.4 km/ hr. respectively. Then in how much time they will meet.
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5f2394884e7e0d508b57ac0d- 14.5 hr.false
- 26 hr.true
- 39 hr.false
- 47 hr.false
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Answer : 2. "6 hr. "
Q: A boat rows downstream covers a distance of 20 km in 2 hrs while it covers the same distance upstream in 5 hrs. Then speed of the boat in still water is :
848 05f23e7d11436461f6a2f5859
5f23e7d11436461f6a2f5859- 19 km/ hrfalse
- 210 km/ hrfalse
- 37 km/ hrtrue
- 48 km/ hrfalse
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