How long does a lorry 200 m long traveling at 80 kmph takes to cross a bridge of 200 m in length?  Choose one:
A) 15
B) 17
C) 15
D) 16
E) 18
D = 200 + 200= 
<gadget id="calculator">200 + 200</gadget>
<output>400</output>
400 m   S= 80 * 5/18 = 200/9   T = 400 * 9/200= 
<gadget id="calculator">400 * 9/200</gadget>
<output>18</output>
18 sec   Answer:18
<result>E</result>
How long does a lorry 200 m long traveling at 80 kmph takes to cross a bridge of 200 m in length?