Answers

2014-05-29T15:22:39+05:30
40 km\h
d1=15km s1=30km\h
d2=10km s2=20km\h
d3=75km s3=50km\h

total time taken=t1+t2+t3
=0.5+0.5+1.5=2.5
speed =distance\time
100\2.5=40km\h
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