A car covers four successive 7 km distance at speeds of 10 km/hr, 20 km/hour, 30 km/hr and 60 km/hr respectively. Its average speed over the distance is :

1. A car covers four successive 7 km distance at speeds of 10 km/hr, 20 km/hour, 30 km/hr and 60 km/hr respectively. Its average speed over the distance is :

[Asst. Excutive Officer 2019 [MCQ] : 2019]

1. 40 km/hr

2. 30 km/hr

3. 20 km/hr

4. 50 km/hr

Answer

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