A train 150 m long passes a pole in 5 seconds and passes

Q: Answer-A train 150 m long passes a pole in 5 seconds and passes a platform in 11 seconds. Find the speed of...

When passing a pole, distance length of train 150 m Time 5 s Speed distance time 150 5 30 ms Convert to kmh 30 185 108 kmh When passing platform, distance train length platform length 150 L Time 11 s, speed 30 ms 30 11 150 L 330 150 L L 330 150 180 m Answer Speed 108 kmh, Platform length 180 m.

a platform in 11 seconds. Find the speed of the train in km/h and the length of the platform.

A 100 km/h, Platform length = 170 m Correct Answer Incorrect Answer

B 108 km/h, Platform length = 180 m Correct Answer Incorrect Answer

C 228 km/h, Platform length = 160 m Correct Answer Incorrect Answer

D 148 km/h, Platform length = 120 m Correct Answer Incorrect Answer

Solution

When passing a pole, distance = length of train = 150 m Time = 5 s Speed = distance / time = 150 / 5 = 30 m/s Convert to km/h: 30 × (18/5) = 108 km/h When passing platform, distance = train length + platform length = 150 + L Time = 11 s, speed = 30 m/s 30 × 11 = 150 + L 330 = 150 + L L = 330 − 150 = 180 m Answer: Speed = 108 km/h, Platform length = 180 m.

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