A train speeds past a pole in 25 seconds and a platform 150 m long in 30 seconds. Its length is?
Choose the correct choice from the following answers.
A) 23	B) 22	C) 21	D) 30	E) 19
Let the length of the train be x meters and its speed be y m/sec.   They, x / y = 25 =&gt; y = x/25   (x + 150) / 30 = x / 25   x = 30 m.   Answer:30
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A train speeds past a pole in 25 seconds and a platform 150 m long in 30 seconds. Its length is?