Question 70
A 450 meter long train crosses a bridge 650 meters long in 36 seconds. What is speed (in km/hr) of the train?
Solution
Length of train = 450 m and length of bridge = 650 m
Time taken = 36 seconds
=> Speed = distance/time
= $$\frac{(450+650)}{36}$$
= $$\frac{1100}{36}=\frac{275}{9}$$ m/s
= $$\frac{275}{9}\times(\frac{18}{5})$$ km/hr
= $$55\times2=110$$ km/hr
=> Ans - (A)
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