A train 140 m long is running at 60 kmph. In how much time wiU it pass a platform 260 m long?  Select.
A) 21sec	B) 22sec	C) 23sec	D) 24sec	E) 26sec
s=d/t   d=140+260= 
<gadget id="calculator">140+260</gadget>
<output>400</output>
400m   s=60*5/18 m/sec=50/3 m/sec   t=400/(50/3)=1200/50= 
<gadget id="calculator">1200/50</gadget>
<output>24</output>
24sec   ANSWER:24sec
<result>D</result>
A train 140 m long is running at 60 kmph. In how much time wiU it pass a platform 260 m long?