Your foot is trapped under a railway sleeper. you feel the rail vibrate and then 20s later hear a faint whistle. estimate how much time you have to free yourself. you may assume the railway way is a straight line and: velocity of sound in air = 0.33 km/s , the velocity of vibration along the track = 5 km/s,
train speed: 60 km/hr, 100 km/hr and 150 km/hr

Explanation:

Speed of sound in air = 0.33 km/s

Speed of vibration along the track = 5 km/s

Time = Distance / Speed

When train speed: 60 km/hr

Time you will have is 423.9828 s

When train speed: 100 km/hr

Time you will have is 254.38968 s

When train speed: 150 km/hr

Time you will have is 169.59312 s

the answer is a. the yacht traveled from the dock north to the 200-meter marker in the bay in less than 5 minutes, giving the passengers several more hours to fish.

im doing peak rn so sry if its wrong