the length of the bridge is 200m,which a 100 m long train cross in 60sec. then what is the speed of train?	Choose the correct choice
A) 6 B) 5 C) 4 D) 10 E) 8
speed = length/time   length=(200+100)= 
<gadget id="calculator">(200+100)</gadget>
<output>300</output>
300m   time=60 sec   speed = 300/60= 
<gadget id="calculator">300/60</gadget>
<output>5</output>
5m/sec   answer 5
<result>B</result>
the length of the bridge is 200m,which a 100 m long train cross in 60sec. then what is the speed of train?