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Sunday, November 25, 2018

If a man travels 160 km by car at the speed of 64 km/h and a

If a man travels 160 km by car at the speed of 64 km/h and another 160 km at the speed of 80 km/h, the average speed for the whole journey is
A71.11
B81.11
C91.11
D61.11

Answer : 71.11

Explanation:

Formula: 

Time=Distancespeed

total time taken = (times taken for first 160km + times taken for next 160km)
total time taken =(16064+16080)

=92 hours 
Time taken for 320 Km = 320 ×29=71.11km/hr

Nithin K
answered Dec 3 '2016 at 19:26

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