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) 388	B) 150	C) 288	D) 269	E) 271
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?