Sachin went on a tour and travels first 160 km at 64 km/hr and the next 160 km at 80 km/hr. The average speed for the first 320 km of the tour is how much ?
ANSWERS
Hence, you can do it with the help of shortcut.
When distances are same and we need to calculate Average Speed, it is given by harmonic Mean of the given speeds.
HM = 2ab/a+b
a = 64 km/hr
b = 80 km/hr
Putting values, Average Spped = 71.11 km/hr
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