Latest TCS Aptitude Question SOLUTION: At 12.00 hours Ravi starts to walk from his house at 8 kms an hour. At 13.30 hours, Shankar follows him from Ravi’s house on his bicycle at 12 kms per hour. When will Ravi be 6 k

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At 12.00 hours Ravi starts to walk from his house at 8 kms an hour. At 13.30 hours, Shankar follows him from Ravi’s house on his bicycle at 12 kms per hour. When will Ravi be 6 kms behind Paul?

Asked In TCS Hassan (11 years ago)

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mohd zubair khan  (11 years ago)

(first notice that there is a mistake in question use shankar instead of paul or vice-versa)
walking speed of Ravi= 8 km/h
speed of shankar by bicycle= 12 km/h
shankar starts cycling after 1 and 1/2 hour to that of Ravi
distance travelled by Ravi in 1.5 hours = 1.5*8 = 12 km
relative speed of ravi and shankar= 12-8 = 4 km/h
according to question when shankar will lead Ravi by 6 km it means he will
have to cover a total distance of (12 + 6) = 18 km.
time taken to travell 18 km = 18/4 = 4.5 hours
this time taken by shankar to travell 18 km after 13.30 hours
so he will lead ravi = add(4 and 1/2 hours + 13 and 1/2 hours)
=18 hours (ANSWER)

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Shivakrishna  (11 years ago)

ravi covers a distance of 12km when shanker is going to start his ride
and shankar velocity 12kmph,where as ravi 8kmph..after 1.30 by trial and error consider the distance travelled by them in 2hr i.e ravi (12+16)=28km where as shankar 2*12=24km let us consider after 4.30hr ravi distance (12+36)=48km and shankar can cover 12*9/2=54km so the diff is 6km...so ravi will be 6km behind paul at 1.30+4.30=6p.m

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chandra  (11 years ago)

ravi after 3.00pm [3 hours] he covered distance ==24kms
paul 1 min distance =12/60 ===>>1/5
so after 1.30 min means 90 min he can covered 90(1/5)=18 kms
paul after 3.00pm [1.30 hours ] he covered distance ==18.
so exactely 3.00 pm ravi be 6 kms behind paul.

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bandiharish  (11 years ago)

ravi covers 1.5*8=12km in 1.5hrs i.e upto 13.30hrs...
now paul has to cover 12+6=18km such that ravi will be will be 6km behind paul....but here as both are moving we have to take relative speed,so 18/(12-8) is the time taken i.e 4.5hrs means 4hrs 30mins and 13.30+4.30=18hrs is the ans...

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pendem  (11 years ago)

answer is 18/4=4.5

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