A train speeds past a pole in 15 sec and a platform 110 m long in 25 sec, its length is?  Choose the correct choice from the following choices.
A) 165  B) 150  C) 988  D) 177  E) 171
Let the length of the train be x m and its speed be y m/sec.   Then, x/y = 15 =&gt; y = x/15   (x + 110)/25 = x/15 =&gt; x = 165 m.   165nswer: 165
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A train speeds past a pole in 15 sec and a platform 110 m long in 25 sec, its length is?