How long does a train 110metres long running at the speed of 72 km/hr take to cross a bridge 132metres in length?	Pick:	A) 10	B) 11.1	C) 12.1	D) 31.2	E) 21.5
speed = 72*5/18= 
<gadget id="calculator">72*5/18</gadget>
<output>20</output>
20m/s   total distance covered= 110+132= 
<gadget id="calculator">110+132</gadget>
<output>242</output>
242m   required time= 242/20= 
<gadget id="calculator">242/20</gadget>
<output>121/10 = around 12.1</output>
12.1 sec   Answer is 12.1
<result>C</result>
How long does a train 110metres long running at the speed of 72 km/hr take to cross a bridge 132metres in length?