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Arithmetic Ability
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Q.
A train travelling with a speed of 60 km/hr catches another train travelling in the same direction and then leaves it 120m behind in 18 seconds. The speed of the second train is
A.
42 kmph
B.
72 kmph
C.
36 kmph
D.
44 kmph
View Answer
Correct choice: C
Explanation:
Given speed of the first train = 60 km/hr = 60 x 5/18 = 50/3 m/s Let the speed of the second train = x m/s Then, the difference in the speed is given by 50/3 − x = 120/18 => x = 10 m/s => 10 x 18/5 = 36 km/hr
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