A 600 m long train crosses a platform in 39 sec while it crosses a signal pole in 18 sec. What is the length of the platform?  Pick: A) 800 B) 700 C) 360 D) 370 E) 380
Speed = 600/18 = 100/3 m/sec.   Let the length of the platform be x meters.   Then, (x + 300)/39 = 100/3   =&gt; x = 1300 m.   L=1300-600= 
<gadget id="calculator">1300-600</gadget>
<output>700</output>
700m   Answer: Option 700
<result>B</result>
A 600 m long train crosses a platform in 39 sec while it crosses a signal pole in 18 sec. What is the length of the platform?