Question

A car travels from A to B at a speed of 20 km/hr and returns at a speed of 30 km/hr and walks back with a constant speed of 4 km/hr. His average speed for round trip expressed in km/hr, is

Answer 1

Answer:

Speed of the car from B to A(v) = 30 km/hr. = x/12 hr. = 24 km/hr. Thus, average speed of the car is 24 km/hr.

Answer 2

Answer:

Average Speed is 18 km/hr.

Explanation:

Average Speed = Distance Travelled/ Total Time.

= (20+30+4)km/3hr

= 54km/3hr

= 18km/hr

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