A train speeds past a pole in 15 seconds and a platform 100 m long in 25 seconds. Its length is?
Answers.
A) 176 m	B) 198 m	C) 197 m	D) 150 m	E) 168 m
Let the length of the train be x meters and its speed be y m/sec.   They, x / y = 15   =&gt; y = x/15   x + 100 / 25   = x / 15   x = 150 m.   Answer:150 m
<result>D</result>
A train speeds past a pole in 15 seconds and a platform 100 m long in 25 seconds. Its length is?