Two boys train escape puzzle
Two boys are walking in the woods and they decide to take a shortcut through a railroad tunnel. They had walked 2/3 of the way through the tunnel, but then something horrible happened: a train was coming in the opposite direction towards the 2 boys, and it was coming close to the other entrance of the tunnel.
Each boy ran in a different direction to get out of the tunnel and avoid the incoming train. Each boy ran at the same exact speed of 10 miles per hour, and each boy managed to escape the train at the exact instant in which the train would have hit and killed him.
If the train was moving at a constant speed and each boy was capable of instantaneous acceleration, then how fast was the train going?
Speed of the train – 30 miles per hour
Its a hint- each boy managed to escape the train at the exact instant in which the train would have hit and killed him
Let A is running toward the train and B is moving in opposite direction.
The distance which A has to cover=1-2/3=1/3
The distance which B has to cover=2/3
speed of A and B is same hence A and B will cover the same distance 1/3,
A just escaped when train is at the entrance of the tunnel hence remaining distance for B is 2/3-1/3=1/3
B will cover 1/3 and train will cover 2/3 for the hint line to be true.
Train will run 3 times faster then B
and B is running at 10miles per hour so, train will run at 30 miles per hour.
More puzzles to try-
- 3 + 3 = 3 5 + 4 = 4 1 + 0 = 3 2 + 3 = 4 ...Read More »
- There are 10 stacks of 10 coins each. Each coin weights 10 gms. However, one stack of coins is defective ...Read More »
- Let it be simple and as direct as possible. Interviewer : Tell me how much time (in days) and money would ...Read More »
- Which clock works best? The one that loses a minute a day or the one that doesn’t work at all?Read More »
- Paul, Sam and Dean are assigned the task of figuring out two numbers. They get the following information: Both numbers ...Read More »
- Five puzzleFry ship’s pirates have obtained 100 gold coins and have to divide up the loot. The pirates are all ...Read More »
- Four days are there which start with the letter ‘T‘. I can remember only two of them as “Tuesday , Thursday”. ...Read More »
- Two fathers took their sons to a fruit stall. Each man and son bought an apple, But when they returned ...Read More »
- A farmer is taking her eggs to the market in a cart, but she hits a pothole, which knocks over ...Read More »
- Solve this logic sequence puzzle by the correct digit- 8080 = 6 1357 = 0 2022 = 1 1999 = ...Read More »
- A man leaves his house in the morning to go to office and kisses his wife. In the evening on ...Read More »
- Jasmine, Thibault, and Noah were having a night out and decided to order a pizza for $10. It turned out ...Read More »
- Which letter replaces the question markRead More »
- A murderer is condemned to death. He has to choose between three rooms. The first is full of raging fires, ...Read More »
- Richie established a very strange number system. According to her claim for different combination of 0 and 2 you will ...Read More »
- The result of math class test came out. Fariha’s mark was an even number. Srabon got a prime!! Nabila got ...Read More »
- Robi is a very serious student. On the first day of this year his seriousness for study was 1 hour. ...Read More »
- Ragib: I got digits of a 2 digit number Sakib: Is it an odd? Ragib: Yes. Moreover, the sum of ...Read More »
- If u r genius solve it:- 40 * 14 = 11 30 * 13 = 12 20 * 12 = ...Read More »
- When do we call “10” while looking at number “2”?Read More »