Multiple choice

A man completed a certain journey by train . if 25% of the distance is covered by 300 km/hr, 20% of the distance at 200 km/hr and remaining distance at 550 km/hr. Find the approximate average speed for the whole journey ?

  1. 350

  2. 351

  3. 353

  4. 359
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Average speed = total distance / total time. Let distance be 100 km. Times: 25 km at 300 km/hr = 0.0833 hr, 20 km at 200 km/hr = 0.1 hr, 55 km at 550 km/hr = 0.1 hr. Total time = 0.2833 hr. Average speed = 100/0.2833 ≈ 353 km/hr.

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