Multiple choice

A train running at a speed of 45 km/hr takes 10 seconds to pass a certain point. Then the length of the train is

  1. 120 m

  2. 125 m

  3. 128 m

  4. 450 m
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Convert speed to m/s: 45 km/hr = 45 * (5/18) m/s = 12.5 m/s. Length = speed * time = 12.5 * 10 = 125 meters.

AI explanation

The distance the train travels to pass a point equals its own length, calculated as speed multiplied by time. First, convert the speed of 45 km/hr to m/sec by multiplying by 5/18, which gives 12.5 m/sec. Multiplying this speed by the given time of 10 seconds results in a length of 125 meters.

Keep practicing — related questions