How many seconds will a train 120 meters long take to cross a bridge 150 meters long if the speed of the train is 36 kmph?  Choose the correct choice from the following choices.
A) 17 sec
B) 21 sec
C) 25 sec
D) 27 sec
E) 29 sec
27 sec = 120 + 150= 
<gadget id="calculator">120 + 150</gadget>
<output>270</output>
270   S= 36 * 5/18= 
<gadget id="calculator">36 * 5/18</gadget>
<output>10</output>
10 mps   T= 270/10= 
<gadget id="calculator">270/10</gadget>
<output>27</output>
27 sec
<result>D</result>
How many seconds will a train 120 meters long take to cross a bridge 150 meters long if the speed of the train is 36 kmph?