A car travels 100 km at a speed of 60 km/h and returns with a speed of 40 km/h. Calculate speed for the hole journey?
Answer: 48km/h
Explanation
Using speed =TimeDistance
⇒Time=speeddistanceWe have total time =60100+40100=625Hr
Now, Average speed =Time(tot)Distance(tot)=625200
⇒ Average spped =251200=48k
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