# Boats and Streams - Aptitude Questions and Answers Part 3

**11. A boat rows at 6 kmph in still water between two points 36 km apart. If it takes 8 hours to less to cover this distance downstream than upstream, what is the speed of the stream?**
a. 2 kmph

b. 2.5 kmph

c. 3 kmph

d. 4 kmph

**12. A boat sails at a speed of 15 kmph in still waters. It travels 30 km downstream and comes back in four and a half hours. What is the speed of the stream?**
a. 5 km/h

b. 6 km/h

c. 25 km/h

d. 50 km/h

**13. A steamer takes 8 minutes to cover a distance of 4.8 km downstream while it takes 9 minutes to come back to the same spot upstream. Find the speed of the current.**
a. 2 kmph

b. 2.4 kmph

3. 3 kmph

4. 3.2 kmph

**14. Give: **

Speed of boat in still water = 9 kmph

Speed of water current = 1.5 kmph

Find the time taken by the boat to go 105 km downstream and come back.
a. 16 hours

b. 18 hours

c. 20 hours

d. 24 hours

**15. Given:**
**Distance between points A and B = 6 km**
**Total time taken =** | **11** | **hours** |

**20** |

**Find the speed of boat in still water. **
a. 11 km/h

b. 22 km/h

c. 33 km/h

d. 44 km/h

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