A moving train passes a platform 50 m long in 14 seconds and a lamp post in 10 seconds. The speed of the train (in km/hr) is :
A. 24 km/hr
B. 36 km/hr
C. 40 km/hr
D. 45 km/hr
Answer: Option D
Solution(By Examveda Team)
Let length of train be x and speed be SS = $$\frac{x + 50}{14}$$ , also S = $$\frac{x}{10}$$
Then,
$$\frac{x + 50}{14}$$ = $$\frac{x}{10}$$
5x + 250 = 7x
2x = 250
x = 125
∴ Speed :
= $$\frac{125}{10}$$ × $$\frac{18}{5}$$
= 45 km/hr
Related Questions on Speed Time and Distance
A. 48 min.
B. 60 min.
C. 42 min.
D. 62 min.
E. 66 min.
A. 262.4 km
B. 260 km
C. 283.33 km
D. 275 km
E. None of these
A. 4 hours
B. 4 hours 30 min.
C. 4 hours 45 min.
D. 5 hours
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