Multiple choice

A train is moving at a speed of 160 km/h and covers a certain distance in 4.5 hours. Find the speed of the train to cover the same distance in 4 hours ? ( in km/hr )

  1. 120

  2. 180

  3. 170

  4. 175
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Distance = Speed × Time = 160 × 4.5 = 720 km. Speed needed to cover 720 km in 4 hours = 720/4 = 180 km/h. Speed and time are inversely proportional for fixed distance, so new speed = old speed × (old time/new time) = 160 × (4.5/4) = 180 km/h.

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