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(#M40000016) INFOSYS QUESTION Keep an EYE

Two men are going along a track rail in the opposite direction. One goods train crossed the first person in 20 sec. After 10 min the train crossed the other person who is coming in opposite direction in 18 sec .After the train has passed, when the two persons will meet?

Solution

Let us consider that speed of train , first man and second man are respectively t, f and s.
According to first given condition goods train crossed the first person moving in same direction in 20 sec.
so length of the will be 20(t-f)
similarly train crossed the second man in 18 sec.
so length of the train will be 18(t+s)
on comparing these two equations, we get 20(t-f) = 18(t+s)
or 2t = 20f + 18s
or t = 10f + 9s
now it is given that After 10 min the train crossed the other person who is coming in opposite direction so
if we consider this way of train as L then the next equation will be
L = 600t (here 600 is used for 10 minutes)
finally as asked in the question the time required to meet the two man after the train has passed will be given by
time = (L-600 f)/(f+s) {here 600f is used for the distance traveled by first man in 10 minutes}
= (600t-600f)/(f+s)
= [600(10f+9s)-600f]/(f+s)
= 600(10f+9s-f)/(f+s) = 600*9(f+s)/(f+s) = 600*9 seconds = 600*9/60 min
= 90 minutes


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Asked In Infosys (15 years ago)

Solved Read Solution (4)

Is this Puzzle helpful?   (16)   (5) Submit Your Solution Time Distance and Speed

(#M40000014) INFOSYS QUESTION Keep an EYE

There are 4 married couples. How many couple groups are possible ? there should not be his or her spouse.

Asked In Infosys (15 years ago)

Solved Tijo Jose Read Solution (7)

Is this Puzzle helpful?   (7)   (3) Submit Your Solution Permutation and Combination

(#M40000012) INFOSYS QUESTION Keep an EYE

There are some chicken in a poultry. They are fed with corn. One sack of corn will come for 9 days. The farmer decides to sell some chicken and wanted to hold 12 chicken with him. He cuts the feed by 10% and sack of corn comes for 30 days. So initially how many chicken are there?

Asked In Infosys (16 years ago)

Solved susmit Read Solution (5)

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(#M40000116) IIT-JEE QUESTION sum to n terms Keep an EYE

sum to n terms: 0!/5! + 1!/6! + 2!/7! + ... ?

Solution

r th term of the series is (r-1)!/(r+4)!= 1/r(r+1)(r+2)(r+3)(r+4)
= (1/24r)-(1/6(r+1))+(1/4(r+2))-(1/6(r+3))+(1/24(r+4))
Now put r = 1,2,3,4,5.......upto n and add all the terms [here a special arrangement is that the solution of 1/24-1/6+1/4-1/6+1/24 is 0 so sum of terms from 1/5 to 1/n would be 0]
finally we will get
n(n+5)(n^2+5n+10)/96(n+1)(n+2)(n+3)(n+4)

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Asked In IIT-JEE (16 years ago)

Solved Read Solution (1)

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(#M40000113) SELF QUESTION It is 10 o'clock! Keep an EYE

A clock takes 7 seconds to ring bell at 7 o'clock. How long will it take for the same clock to ring bell at 10 o'clock?

Tijo Jose (16 years ago)

Solved Sanal Jose Read Solution (9)

Is this Puzzle helpful?   (156)   (57) Submit Your Solution Clocks and Calendars

(#M40000010) INFOSYS QUESTION Keep an EYE

The main line train starts at 5.00AM and the harbor line train starts at 5.02AM.Each train has the frequency of 10 minutes. If a guy goes in the morning at a random time what is the probability of he getting main line train?

Asked In Infosys (16 years ago)

Solved Tijo Jose Read Solution (6)

Is this Puzzle helpful?   (14)   (7) Submit Your Solution Time Distance and Speed

(#M40000003) INFOSYS QUESTION Keep an EYE

Three members are hunting in a forest. While crossing stream cartridges of two of them get wetted up. Then the third person divides his cartridges equally. After 4 shots of each person, total cartridges remaining are equal to what each had initially after sharing. How many total cartridges they initially they shared?

Asked In Infosys (16 years ago)

Solved Wafa Read Solution (10)

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(#M40001369) TCS QUESTION Keep an EYE

For the FIFA world cup, Paul the octopus has been predicting the winner of each match with amazing success. It is rumored that in a match between 2 teams A and B, Paul picks A with the same probability as A's chances of winning. Let's assume such rumors to be true and that in a match between Ghana and Bolivia, Ghana the stronger team has a probability of 2/3 of winning the game. What is the probability that Paul will correctly pick the winner of the Ghana-Bolivia game?
a)1/9 b)4/9 c)5/9 d)2/3

Asked In TCS (2055 years ago)

Unsolved Read Solution (3)

Is this Puzzle helpful?   (2)   (0) Submit Your Solution Alligation or Mixture

(#M40000314) AIEEE QUESTION Keep an EYE

A contract on a construction job specifies a penalty for delay of completion beyond a certain date as follows: Rs 200 for first day, Rs. 250 for second day, Rs. 300 for third day and so on. If the contractor pays Rs 27750 as penalty, find the number of days for which the construction work is delayed.

Asked In AIEEE (2055 years ago)

Solved C.T.Narayanan Read Solution (2)

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