How many seconds will a train 250 meters long take to cross a platform 200 meters long if the speed of the train is 90 kmph? Choose the correct choice from the following choices.
A) 18 sec	B) 15 sec	C) 21 sec	D) 16 sec	E) 20 sec
D = 250+200= 
<gadget id="calculator">250+200</gadget>
<output>450</output>
450   S= 90* 5/18= 
<gadget id="calculator">90* 5/18</gadget>
<output>25</output>
25 mps   T= 450/25= 
<gadget id="calculator">450/25</gadget>
<output>18</output>
18 sec   18 sec) 18 sec
<result>A</result>
How many seconds will a train 250 meters long take to cross a platform 200 meters long if the speed of the train is 90 kmph?