Latest TCS Aptitude Question SOLUTION: M drves alng d permtr of a square of side 10kns.she drvs alng d frst side at 10kmph,2nd 20kmph,3rd 30kmph,4th 40kmph..avg speed 30,18, 19.2, 20

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M drves alng d permtr of a square of side 10kns.she drvs alng d frst side at 10kmph,2nd 20kmph,3rd 30kmph,4th 40kmph..avg speed
30,18, 19.2, 20

Asked In TCS Hari Priya Kazipeta (11 years ago)

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dhaval pujara  (11 years ago)

IT's 19.2
i explain... we have to apply formula 2xy/x+y three timesss
for first 10 &20 avreage speed will be 400/30=40/3 for secound 30& 40

avrage speed=2400/70=240/7... and finally apply avg formula between this two speed


avg speed=2*40/3*240/7 /40/3+240/7 = = =19.2 answer

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Taruna  (11 years ago)

total time=10/10+10/20+10/30+10/40
total d=40
avg v=40/(25/12)=19.2

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