Two trains are running at 40 km/hr and 20 km/hr respectively in the same direction. Fast train completely passes a man sitting in the slower train in 5 seconds. What is the length of the fast train?
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Two trains are running at 40 km/hr and 20 km/hr respectively in the same direction. Fast train completely passes a man sitting in the slower train in 5 seconds. What is the length of the fast train?
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x = 27.78 m + y
x = (74.99 × 5) / 18
x = 20.83 m/s × 5 s + y
x = 20.83 × 5 × 18 / 1000 + y
x = 0.936 km + y
0.936 + y = 74.99 × 5 / 18
y = 0.208 km
x = 0.936 + y = 0.936 + 0.208 = 1.144 km