Correct Answers: | |

Wrong Answers: | |

Unattempted: |

### Question 1

A train is running at a speed of 184km/h. If it takes 18sec to move past a telegraph pole, then what is its length?

**A**

920 meters.

**B**

921 meters.

**C**

919 meters.

**D**

922 meters.

**Soln.**

**Ans: a**

The total distance to be covered is equal to the length of the train. By the time and distance formula, we get length = time × speed × (5/18), which gives $18 × 184 × (5/18)$ = 920m. Please note that 5/18 is the conversion from km/h to m/s.

### Question 2

A train running at a speed of 19m/s crosses a pole in 18sec. How long will it take to cross a platform of length 684m?

**A**

54 sec.

**B**

55 sec.

**C**

53 sec.

**D**

56 sec.

**Soln.**

**Ans: a**

The length of the train can be obtained from the time it takes to cross the pole. The length of the train = $19 × 18$ = 342m. To cross the platform it must travel a total distance equal to the combined lengths of the train and the platform at this speed. So time = ${342 + 684}/19$ = 54 seconds.

### Question 3

A train running at a speed of 18m/s crosses a pole in 16sec. How long will it take to cross a platform of length 864m?

**A**

64 sec.

**B**

65 sec.

**C**

63 sec.

**D**

66 sec.

**Soln.**

**Ans: a**

The length of the train can be obtained from the time it takes to cross the pole. The length of the train = $18 × 16$ = 288m. To cross the platform it must travel a total distance equal to the combined lengths of the train and the platform at this speed. So time = ${288 + 864}/18$ = 64 seconds.

### Question 4

A train of length 119 m crosses a bridge at a speed of 45 km/h in 38 seconds. What is the length of the bridge?

**A**

6037 meters.

**B**

6038 meters.

**C**

6036 meters.

**D**

6039 meters.

**Soln.**

**Ans: a**

In 38 seconds the train covers a distance of 38 × 45 × (18/5) = 6156 meters. This distance is the sum of the lengths of the train and the bridge. Subtracting the length of the train we get the length of the bridge = 6156 - 119 = 6037 meters.

### Question 5

A train is running at a speed of 56m/s. If it takes 3sec to move past a telegraph pole, then what is its length?

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This Blog Post/Article "Problems on Trains Quiz Set 003" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Updated on 2017-04-07.