Multiple choice

108 மீ நீளமுள்ள ரயில் ஆனது 50 கி.மீ/ மணி வேகத்தில் சென்று கொண்டிருக்கிறது. அது 112 மீ நீளமுள்ள ஒரு ரயிலை எதிர்திசையில் 6 நொடிகளில் கடக்கிறது. எனில் இரண்டாவது ரயிலின் வேகம் என்ன? The 108 m long train is traveling at 50 km / h. It crosses a 112 m long train in 6 seconds. What is the speed of the second train?

  1. 80 கி.மீ/ மணி /80 km / h

  2. 81 கி.மீ/ மணி /81 km / h

  3. 82 கி.மீ/ மணி / 82 km / h

  4. 83 கி.மீ/ மணி / 83 km / h

  5. இவற்றில் ஏதுமில்லை/None of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Total distance = 108 + 112 = 220 m. Time = 6 seconds. Relative speed = 220/6 m/s = 110/3 m/s. Converting to km/h: (110/3) * (18/5) = 132 km/h. Since they are in opposite directions, relative speed = speed1 + speed2. 132 = 50 + speed2, so speed2 = 82 km/h.

AI explanation

When two trains move in opposite directions, their relative speed is the sum of their individual speeds. Let the speed of the second train be x km/h, so the relative speed is (50 plus x) km/h. The total distance they need to cover to cross each other is 108 m plus 112 m, which equals 220 m. We convert the relative speed to meters per second, giving (50 plus x) multiplied by 5/18, and set this equal to the total distance divided by the time: 220 divided by 6. Solving the equation (50 plus x) multiplied by 5/18 equals 220/6 results in x equals 82. The speed of the second train is 82 km/h.