56. If a car covers a certain distance at a speed of 65 kmph and comes back at a speed of 70 kmph. What is the average speed during his journey? a) 65.4 b) 67.4 c) 68.4 d) 66.4
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Answer:
C - 68.4
Step-by-step explanation:
C = 68.4
very simple example
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