A train speeds past a pole in 15 sec and a platform 100 m long in 25 sec, its length is?	Choose the correct choice from the following choices
A) 288
B) 150
C) 188
D) 166
E) 122
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 + 100)/25 = x/15 =&gt; x = 150 m.   Answer: 150
<result>B</result>
A train speeds past a pole in 15 sec and a platform 100 m long in 25 sec, its length is?