Caselets

Q: What is the length of the platform?

Correct Answer: Option B (240 meters). Speed of Train P = 72 * (5/18) = 20 m/s. Distance covered to cross platform = Length of P + Length of Platform. 20 * 24 = 240 + Platform => 480 = 240 + Platform => Platform = 240 meters.

Q: What is the length of the tunnel?

Correct Answer: Option B (390 meters). Speed of Train Q = 90 * (5/18) = 25 m/s. Distance covered to cross tunnel = Length of Q + Length of Tunnel. 25 * 30 = 360 + Tunnel => 750 = 360 + Tunnel => Tunnel = 390 meters.

Q: How much time will Train P and Train Q take to completely cross each other?

Correct Answer: Option C (13.3 seconds). Total distance to cross each other = Length of P + Length of Q = 240 + 360 = 600 meters. Relative speed (opposite directions) = Speed of P + Speed of Q = 20 + 25 = 45 m/s. Time taken = Distance / Relative Speed = 600 / 45 = 13.33 seconds.

Q: If Train P and Train Q were running in the same direction, how much time would the faster train take to completely cross the slower train?

Correct Answer: Option C (120 seconds). Total distance = 240 + 360 = 600 meters. Relative speed (same direction) = 25 - 20 = 5 m/s. Time taken = Distance / Relative Speed = 600 / 5 = 120 seconds.

Q: What is the difference between the total lengths of the tunnel and the platform?

Correct Answer: Option C (150 meters). Length of Tunnel = 390 meters. Length of Platform = 240 meters. Difference = 390 - 240 = 150 meters.

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Caselet Context & PassageSet 8: Time & Distance (Trains)

Train P, which is 240 meters long, is running at a speed of 72 km/hr. Train Q, which is 360 meters long, is running at a speed of 90 km/hr in the opposite direction on a parallel track. Train P completely crosses a stationary platform in 24 seconds. Train Q completely crosses a tunnel in 30 seconds.

Q71

What is the length of the platform?

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Q72

What is the length of the tunnel?

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Q73

How much time will Train P and Train Q take to completely cross each other?

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Q74

If Train P and Train Q were running in the same direction, how much time would the faster train take to completely cross the slower train?

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Q75

What is the difference between the total lengths of the tunnel and the platform?

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Caselets

What is the length of the platform?

Community Discussion & Shortcut Formulas

What is the length of the tunnel?

Community Discussion & Shortcut Formulas

How much time will Train P and Train Q take to completely cross each other?

Community Discussion & Shortcut Formulas

If Train P and Train Q were running in the same direction, how much time would the faster train take to completely cross the slower train?

Community Discussion & Shortcut Formulas

What is the difference between the total lengths of the tunnel and the platform?

Community Discussion & Shortcut Formulas