Multiple choice

A car travels at a speed of 80 km/h during the first half of its running time and at 40 km/h during the other half , then the average speed of the car.......

  1. 50 km/hr

  2. 75 km/hr

  3. 60 km/hr

  4. 40 km/hr
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When time is split equally, average speed is the arithmetic mean of the two speeds: (80 + 40) / 2 = 60 km/hr.

AI explanation

Since the distances covered by the two speeds are unequal but the time intervals are equal, we calculate the average speed using the weighted average formula: (u + v) / 2. Substituting the given values gives (80 km/h + 40 km/h) / 2, which equals 120 / 2. The average speed of the car is 60 km/hr.

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