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Time, Speed & Distance · Question 42 of 71

Question 42

EasyOriginal question

A 360 m long train crosses a 240 m bridge in 30 seconds. What is the speed of the train?

Options for question 42

Show the answer and explanation
CorrectNot quiteAnswer D

Correct answer: D

Explanation

  1. Distance = 360+240=600360 + 240 = 600 m.

  2. Speed =60030=20= \frac{600}{30} = 20 m/s =20×185=72= 20 \times \frac{18}{5} = 72 km/h.

Worth noting

28.8 km/h uses only the bridge (240 m), and 43.2 km/h uses only the train (360 m).

Concept
Crossing a bridge: distance = train length + bridge length
Typical time
40 s
Your time
—
The rule this testsTrains
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