Multiple choice

A man completes 30 km of a journey at the speed of 6 km /hr and remaining 40 km of the journey in 5 hrs. His average speed for the whole journey is

  1. 14 km /hr

  2. 7 km/hr

  3. 7.5 km/hr

  4. 8 km/hr
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The man travels 30 km at 6 km/hr, taking 5 hours. He travels another 40 km in 5 hours. Total distance is 70 km and total time is 10 hours, so average speed is 70/10 = 7 km/hr.

AI explanation

The average speed for the whole journey is total distance divided by total time. The total distance is 30 km + 40 km = 70 km, and the total time is (30 / 6) + 5 = 10 hours. Dividing 70 km by 10 hours gives an average speed of 7 km/hr.

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