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1. Sabarmati express takes 18 seconds to pass completely through a station 162 m long and 15 seconds through another station 120 m long. The length of the train is :

A. 132 m

B. 100 m

C. 80 m

D. 90 m

Solution:

Let length of the train be x m
Speed of train,

\frac{x + 162}{18} = \frac{x + 120}{15}

x = 90 m

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