A train speeds past a pole in 15 seconds and a platform 100 meter long in 25 seconds. What is length of the train ? Select:
A) 140 meter B) 145 meter C) 150 meter D) 155 meter E) 160 meter
Explanation:   Let the length of the train is x meter and Speed of the train is y meter/second   Then x/y = 15 [because distance/speed = time]   =&gt; y = 15/x   x+100/25 =x/15   x=150 meters   So length of the train is 150 meters   ANSWER IS 150 meter
<result>C</result>
A train speeds past a pole in 15 seconds and a platform 100 meter long in 25 seconds. What is length of the train ?