A train speeds past a pole in 15 sec and a platform 100 m long in 25 sec, its length is?	Pick
A) 171
B) 150
C) 278
D) 266
E) 256
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?