How long does a train 110 m long running at the speed of 72 km/hr takes to cross a bridge 132 m length?	Choose the correct answer:	A) 12.7 sec	B) 12.1 sec	C) 18.1 sec	D) 17.1 sec	E) 12.7 sec
Speed = 72 * 5/18= 
<gadget id="calculator">72 * 5/18</gadget>
<output>20</output>
20 m/sec   Total distance covered= 110 + 132= 
<gadget id="calculator">110 + 132</gadget>
<output>242</output>
242 m.   Required time= 242/20= 
<gadget id="calculator">242/20</gadget>
<output>121/10 = around 12.1</output>
12.1 sec.   Answer:12.1 sec
<result>B</result>
How long does a train 110 m long running at the speed of 72 km/hr takes to cross a bridge 132 m length?