Abdul, while driving to school, computer the average speed of his trip to be 20km/h1 on his return trip along the some road there is less traffic and the average speed is 40km/h1 what is the average speed of Abdul trip
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Answer: Average speed =total distance covered ÷time taken
Let distance =x
Time during ist trip=distance÷speed=x÷20
Time during second trip=x÷30
Total time =x÷20+x÷30=3x+2x ÷60 =5x ÷60=1÷12x
Average speed=x+x÷x/12=2x×12÷x=24km/h
Explanation:
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