A train speeds past a pole in 15 sec and a platform 110 m long in 25 sec, its length is?	Choose the correct answer
A) 100	B) 150	C) 160	D) 165	E) 180
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.   Answer: Option 165
<result>D</result>
A train speeds past a pole in 15 sec and a platform 110 m long in 25 sec, its length is?