Latest Elitmus Aptitude Question SOLUTION: A & B two train,A starts from Mumbai with 51 kmph speed towards delhi at 12pm and B starts from Delhi to mumbai @ 49 kmph at 1pm, distance bw them is 273 km and each min of time B

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(#M40041337) ELITMUS Numerical Ability question time and distance Keep an EYE

A & B two train,A starts from Mumbai with 51 kmph speed towards delhi at 12pm and B starts from Delhi to mumbai @ 49 kmph at 1pm, distance bw them is 273 km and each min of time B calculates dist bw them so how many times b calculates distance as whole number?

Asked In Elitmus Rakshit (9 years ago)

Solved RAHUL KUMAR Read Solution (4)

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RAHUL KUMAR  (9 years ago) Best Solution

ANs: 44 time distance between them will be whole number

distance bw trains =273km
At 1pm distance bw trains=273-51=222km
both trains are coming in opposite direction so total speed=51+49=100kmph=5/3kmpm
so each min the distance travelled by both trains is 5/3km
so if we start counting 5/3(1st min), 10/3(2nd min), 15/3(3rd min)........
between every 5km dis travelled by A and B ....B once note a whole no
so 222/5=44 ans

Is this solution Helpfull? Yes (45) | No (10)  

Pooja Malviya  (9 years ago)

ans: 47
distance bt train =273km
after 1 hr at 1pm the remaining distance is=273-52=222km
relative speed=51+49=100kmph
in min speed is=100/60=5/3
that means after every 3 mins distance between the train will be a whole number.
total time to meet the trains=222/100=2.22hr
we know that in every 3 min the drive not distance as a whole number
1st hr+2nd hr+22min= 20+20+7=47 times

Is this solution Helpfull? Yes (20) | No (17)  

SHANUR RAHMAN  (8 years ago)

oye miss pooja......2.22 hrs mtlb 2hrs aur 22 mints nhi hota.....

Is this solution Helpfull? Yes (8) | No (2)  

eswara reddy  (9 years ago)

distance between trains=273km
at 1pm distance between trains=273-51=222km
both trains arecoming in opposite directions so total speed=51+49=100km
so each min the distance travelled by both trains is 5/3kmpm
between every 5/3km distance travelled by trains.... b once note a whole number
so 222/(5/3)=133

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