A train 120 m long passed a pole in 6 sec. How long will it take to pass a platform 360 m long?  Choose the correct choice from the following.
A) 20 sec	B) 21	C) 22	D) 23	E) 24
Speed = 120/6= 
<gadget id="calculator">120/6</gadget>
<output>20</output>
20 m/sec.   Required time= (120 + 360)/20= 
<gadget id="calculator">(120 + 360)/20</gadget>
<output>24</output>
24 sec.   Answer:24
<result>E</result>
A train 120 m long passed a pole in 6 sec. How long will it take to pass a platform 360 m long?