Interested to Buy Any Domain ? << Click Here >> for more details...
One train leaves Los Angeles at 15mph heading for New York.
Another train leaves from New York at 20mph heading for Los
Angeles on the same track. If a bird, flying at 25mph,
leaves from Los Angeles at the same time as the train and
flies back and forth between the two trains until they
collide, how far will the bird have traveled?
- 21 Answers
- 46073 Views
- Microsoft, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / rakesh and priyanka
Solution
Apply approximation.
Find the time (t hours) taken for both trains to meet:
15t + 20t = 5000
35t = 5000
35t / 35 = 5000 / 35
t = 1000/7
Find the approximated distance flied by the bird:
25 * (1000/7) = 25000/7
The distance is 25000/7 miles
| Is This Answer Correct ? | 32 Yes | 10 No |
Answer / rohan
Answer #1 by Rakesh and Priyanka is correct, except do not
assume the distance to be 5000. Take it as 'd' or 'x' or
whatever you wish, and work out the answer in terms of the
unknown.
The answer, btw, is 5d/7, which is 25000/7 if d=5000
| Is This Answer Correct ? | 13 Yes | 2 No |
Answer / rakesh
insufficient information distance between LA and NY is not
given it should be given to find the no solution
| Is This Answer Correct ? | 25 Yes | 15 No |
Answer / charkilah
There are two answers. (1) The total distance flown by the
bird back and forth, and (2) the distance from where the
bird left and where the trains collide. It is difficult to
guess from the wording which answer they are asking for.
Either way the answer is fairly straightforward.
1). The distance from L.A. when the trains collide is:
15/(15+20) = 3/7D where D is distance from LA to NY
2). The time it takes to get to this point can be
multiplied times the speed of the bird to get total
distance.
(3/7D)/15 X 25 = 5/7D
Good luck in your interview
| Is This Answer Correct ? | 5 Yes | 1 No |
Answer / ken
A distance between LA and New York is not given so we cannot
give a distance for the bird. However, we can devise a
formula that indicates how much time it will take for the
trains to meet. Once we know how long it takes for the
trains to meet we then simply multiply 25 mph by the time to
give us the distance the bird flies.
| Is This Answer Correct ? | 9 Yes | 6 No |
Answer / luigi
Always AFTER 10miles from impact point in New York
direction! ;-))
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / s chand
let total distance be 420 miles
15t+20t=420
t=12hr
they collide after 12hr
so distance covered by bird=12*25=300miles
| Is This Answer Correct ? | 15 Yes | 14 No |
Answer / manoranjan
find the time taken for collision of the train.
let us consider it to be "x"..the bird would have been
flying until the train collides..so the bird will be
traveling for "x" hrs .. the bird would have traveled "25x"
miles.....
| Is This Answer Correct ? | 3 Yes | 2 No |
Answer / brian kendig
The distance from Los Angeles to New York is roughly 2440
miles, as can be looked up online.
If the trains are moving towards each other at 15mph and
20mph, then they are closing at a rate of 35mph. The time
required to cover 2440 miles at 35mph is about 70 hours
(2440/35). (Incidentally, this means the train from LA has
traveled about 1050 miles, and the train from NY has
traveled about 1400 miles, when they collide.)
If a bird flies at 25mph for 70 hours, it will have traveled
1750 miles, which is the answer.
You don't have to worry about when it reaches either train
and turns around; all you have to know is that it flies for
70 hours.
| Is This Answer Correct ? | 2 Yes | 1 No |
Answer / travis
Ugh... The question is not looking for an answer, it's
looking for how you approach the problem. You know there is
no 'right' answer because even solving for the unknown
distance will get you a wrong answer because it assumes the
bird must make the same path as the trains which is
incorrect. The bird can fly strait, while the trains can
not. So even .714 X is incorrect. There is no answer they
just want to see how you answer it.
| Is This Answer Correct ? | 1 Yes | 1 No |
5,17,37,55,101,.....?
Imagine a rectangle.Its length=2*width.A square of 1 inch is cut on all corners so that the remaining portion forms a box when folded.the volume of the box is_____ cubic inches.find the original dimensions of the box.
3 persons started placementpapers with a capital of Rs.3000 . B invest Rs.600 less than A, C invest Rs.300 less than B. Then what is the share amount of B in a profit of Rs.886 ?
A can do a piece of work in 20 days, which B can do in 12 days. In 9 days B does ¾ of the work. How many days will A take to finish the remaining work?
A family I know has several children. Each boy in this family has as many sisters as brothers but each girl has twice as many brothers as sisters. How many brothers and sisters are there?
(7*7=49)(4*9=36)(3*6=18) (1*8=8)
A person was fined for exceeding the speed limit by 10 km/hr. Another person was also fined for exceeding the same speed limit by twice the same. If the second person was traveling at a speed of 35km/hr,find the speed limit?
a man showed to a woman sitting in a park & told to his friend.she is the daughter of my grand mother only son.then what is the relation to him with her?
what is pH value of fertile soil ?
In a library, there are two racks with 40 books per rack. On a given day, 30 books were issued. What fraction remained in the racks?
what is income tax
In 60 reems of paper 40 reems were utilised then what percent will remain?
English 
