Correct Answers: | |

Wrong Answers: | |

Unattempted: |

### Question 1

A boat travels a downstream distance of 28 km in 2 hours, and an upstream distance of 56 km in 7 hours. What is the speed of the stream?

**A**

3 kmph.

**B**

4 kmph.

**C**

2 kmph.

**D**

6 kmph.

**Soln.**

**Ans: a**

The downstream speed = $28/2$ = 14 km/h, and the upstream speed = $56/7$ = 8 km/h. By the shortcut method, the speed of the stream is half of the difference between the downstream and upstream speeds of the boat. So the required speed = ${14 - 8}/2$ = 3 km/h.

### Question 2

A boat travels a downstream distance of 60 km in 5 hours, and an upstream distance of 30 km in 5 hours. What is the speed of the stream?

**A**

3 kmph.

**B**

4 kmph.

**C**

2 kmph.

**D**

6 kmph.

**Soln.**

**Ans: a**

The downstream speed = $60/5$ = 12 km/h, and the upstream speed = $30/5$ = 6 km/h. By the shortcut method, the speed of the stream is half of the difference between the downstream and upstream speeds of the boat. So the required speed = ${12 - 6}/2$ = 3 km/h.

### Question 3

If the speed of a boat in the direction of the stream current is 24 km/h, and the speed of the current is 10 km/h, what would be the speed of the boat against the current?

### Question 4

A boat can travel 252 km downstream in 18 hours. If it covers the same distance upstream in 42 hours, what is the rate of flow of the stream?

**A**

4 kmph.

**B**

5 kmph.

**C**

3 kmph.

**D**

7 kmph.

**Soln.**

**Ans: a**

The downstream speed = $252/18$ = 14 km/h, and the upstream speed = $252/42$ = 6 km/h. By the shortcut method, the speed of the stream is half of the difference between the downstream and upstream speeds of the boat. So the required speed = ${14 - 6}/2$ = 4 km/h.

### Question 5

A boat has a downstream speed of 16 km/h and an upstream speed of 6 km/h. What is the speed of the stream?

This Blog Post/Article "Boats and Streams Quiz Set 015" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Updated on 2020-02-07. Published on: 2016-05-06