## Quantitative Aptitude for IBPS, SBI, RBI, LIC, IPPB exams

## Boats and Streams

### Formulas

__Speed = Distance/Time__

**D = S ✖ T**

- Speed of the boat/man in still water =
**U** - Speed of the river/current =
**V** - Speed downstream =
**U + V** - Speed upstream =
**U - V** - Time downstream =
**D / (U+V)** - Time upstream =
**D / (U-V)**

###
**Problems**

- A boat can travel with a speed of 12 kmph in still water. If the speed of the stream is 6 kmph, find the time taken by the boat to go 72 km down stream.
- 2 hrs
- 3 hrs
- 4 hr
- None of these
- A boat can travel along with the stream with a speed of 20 kmph. The speed of the river is 5 kmph. What is the speed of the boat against the current?
- 5 kmph
- 10 kmph
- 15 kmph
- 8 kmph
- A man rows 13 km upstream and 28 km downstream in 5 hr each. What is the speed of the river?
- 1.5 kmph
- 2 kmph
- 2.5 kmph
- 3 kmph
- If a man rows at 6 kmph in still water and 4.5 kmph against the current, then his rate of rowing along the current is?
- 9.5 kmph
- 5. 25 kmph
- 7.5 kmph
- 9 kmph
- A boat running upstream takes 9 hrs to cover a certain distance. It takes 6 hours to cover the same distance downstream. What is the ratio of the speed of the boat and speed of the river?
- 3 : 2
- 2 : 5
- 5 : 1
- 1 : 3

### Answers

- 3
- 2
- 1
- 3
- 3

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