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A 200m long train passes through a 1.6km long bridge at a constant speed of 120s, and the running speed of the train is () A. 15m/s B. 11.7m/s C. 1.7m/s D. 13.3m/s
The actual distance traveled by the train is s = 1600m + 200m = 1800m,
Actual speed v = s
t=1800m
120s=15m/s．
So choose a
A 200m long train passes through an iron bridge at a constant speed of V = 54km / h for 2min. Find the length of the iron bridge?
Known: train speed v = 54km / h = 15m / s, time t = 2min = 120s, train length s = 200m
Find: bridge length s =?
∵v=s
t，
Total distance traveled by vehicle within 2min:
S total = VT = 15m / S × 120s=1800m，
The length of the bridge is s Bridge = S-S vehicle = 1800m-200m = 1600m
Answer: the length of the bridge is 1600m
It takes 65 seconds for a train to pass through a 1000 meter bridge and 50 seconds if it passes through a 730 meter tunnel at the same speed. Find the forward speed and length of the train
The vehicle speed is: (1000-730) ÷ (65-50),
=270÷15，
=18 (M / s),
Conductor: 18 × 65-1000，
=1170-1000，
=170 (m),
A: the speed of the train is 18 meters per second, and the length of the train is 170 meters
It takes 65 seconds for a train to pass through a 1000 meter bridge and 50 seconds if it passes through a 730 meter tunnel at the same speed. Find the forward speed and length of the train
The vehicle speed is: (1000-730) ÷ (65-50),
=270÷15，
=18 (M / s),
Conductor: 18 × 65-1000，
=1170-1000，
=170 (m),
A: the speed of the train is 18 meters per second, and the length of the train is 170 meters
It takes 65 seconds for a train to pass through a 1000 meter bridge and 50 seconds if it passes through a 730 meter tunnel at the same speed. Find the forward speed and length of the train
The vehicle speed is: (1000-730) ÷ (65-50),
=270÷15，
=18 (M / s),
Conductor: 18 × 65-1000，
=1170-1000，
=170 (m),
A: the speed of the train is 18 meters per second, and the length of the train is 170 meters
It takes 65 seconds for a train to pass through a 1000 meter bridge and 50 seconds if it passes through a 730 meter tunnel at the same speed. Find the forward speed and length of the train
The vehicle speed is: (1000-730) ÷ (65-50),
=270÷15，
=18 (M / s),
Conductor: 18 × 65-1000，
=1170-1000，
=170 (m),
A: the speed of the train is 18 meters per second, and the length of the train is 170 meters
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