Question

A car travels equal distances in the same direction with speed 60 kmph, 20 kmph and 10 kmph respectively. The magnitude of average speed of the car over the whole journey of motion is

Answer 1

Answer:

60*20*10=12000 divided by 1000=12

Explanation: i think this should be the answer. i am sleepy so i can not think straight forgive  me if it is wrong.