Answers

  • Brainly User
2014-05-16T17:18:43+05:30
Here , total dist = speed x time
 so , d = (60 x 0.52) + (30 x 0.24)+( 70 x 0.71)
=>d= 88.1 km
here ,total time taken will be 
t= 0.52+0.24+0.71 = 1.47 hrs
wkt , average speed = d/t 
=> 59.932 = 60 km/hr 
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2014-05-16T17:33:18+05:30
Total distance travel by train = 60*0.52 + 30*0.24 + 70*0.71 = 88.10Km.
total time taken by train = 0.52 + 0.24 + 0.71 = 1.47hrs.
average speed = total distance/total time
                     = 88.10/1.47
                     = 59.93Km/hr.
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