A train speeds past a pole in 15 seconds and a platform 100 m long in 25 seconds. Its length is:  Choose the correct choice: A) 145 B) 146 C) 147 D) 150 E) 152
Let the length of the train be x meters and its speed be y m/sec.   They, x / y = 15 =&gt; y = x/15   x + 100 / 25 = x / 15   x = 150 m.   Answer: Option 150
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A train speeds past a pole in 15 seconds and a platform 100 m long in 25 seconds. Its length is: