Latest TCS Aptitude Question SOLUTION: The famous Denali Star train starts from anchorge & travels towards fair banksat speed 50 mph.After some time another train Glacier Discovery Train( At parallel track) at fair ba

• Placement Papers
• /
• TCS
• /
• Numerical Ability
• /
• Time Distance and Speed

TCS Question Papers: TCS Interview Experience(90) TCS Company Profile

(#M40039674) TCS Numerical Ability question Keep an EYE

The famous Denali Star train starts from anchorge & travels towards fair banksat speed 50 mph.After some time another train Glacier Discovery Train( At parallel track) at fair banks And moves towards Anchorge at a speed of 70 mph. Both the trains Denali star & Glacier discovery have a length 1/6 miles each .After the trains meet how many seconds will faster train take to overtake the slower one

Asked In TCS vivek gupta (9 years ago)

Solved Raja Sekhar Read Solution (9)

Is this Puzzle helpful?   (4)   (1) Submit Your Solution Time Distance and Speed

Read Solution (9) :

Raja Sekhar  (9 years ago) Best Solution

total distance = (1/6)+(1/6) = 1/3 miles
relative speed = (50+70) mph = 120 mph
time taken = (1/3)/(120) hours = 10 seconds

Is this solution Helpfull? Yes (34) | No (2)  

Saraswathy  (9 years ago)

Total distance = 1/6 + 1/6 = 1/3
Since trains travelling in same direction, we have to subtract speed...
So relative speed = 70-50 = 20
Time taken = (1/3)/20 = 1/60 hours => (1/60)*60 mins => 1 mins => 60 sec

Ans : 60 sec

Is this solution Helpfull? Yes (22) | No (39)  

Vishal Rastogi  (9 years ago)

distance = 2 x (1/6)= 1/3
relative speed = 50 +70=120
time = 1/3mile / 120 mph= 10 seconds

relative speed should be added because they are going in opp. direction

Is this solution Helpfull? Yes (8) | No (1)  

vivek gupta  (9 years ago)

wrong...
option is -
a) 60 sec
b) 20 sec
c) 180 sec
d) 32 sec

Is this solution Helpfull? Yes (1) | No (1)  

Vishal Rastogi  (9 years ago)

@vivek gupta....check your options again answer is 10 seconds for sure..or this might be the dummy question(i dont know whether it is really there or a myth..i just heard about it)
@saraswathy.. u can not subtract to find relative speed since they are moving in opposite directions

Is this solution Helpfull? Yes (1) | No   

csemalli  (9 years ago)

0sec ....since both trains met and faster train already overtaken the slower one.

Is this solution Helpfull? Yes | No (4)  

Yarra Aparna  (9 years ago)

The trains are in opposite direction because 1st train starts from anchorge & 2nd train towards anchorage.
The relative spped of the trains = 70+50 = 120m/h
distance = (1/6)+(1/6) = 1/3
time = (1/3)/120 = 10 seconds

Is this solution Helpfull? Yes | No (1)  

Raja  (9 years ago)

Wrong Question! Direction of two trains not clear from the question.

Is this solution Helpfull? Yes | No (4)  

ADI  (9 years ago)

as trains are moving in opposite direction,
miles/hour to meter/sec for speed(70+50=120)=53.64
miles to meter for total distance(1/6+1/6)=1/3=535.91
t=d/s =535.91/53.64=9.98 i.e.=10 sec

Is this solution Helpfull? Yes | No (1)  

Please Login to Read Solution.