How long does a train 110 m long running at the speed of 72 km/hr takes to cross a bridge 175 m length?
Choose one
A) 12.9 sec B) 12.1 sec C) 17.9 sec D) 16.8 sec E) 14.25 sec
Speed = 72 * 5/18= 
<gadget id="calculator">72 * 5/18</gadget>
<output>20</output>
20 m/sec   Total distance covered= 110 + 175= 
<gadget id="calculator">110 + 175</gadget>
<output>285</output>
285 m.   Required time= 285/20= 
<gadget id="calculator">285/20</gadget>
<output>57/4 = around 14.25</output>
14.25 sec.   Answer: 14.25 sec
<result>E</result>
How long does a train 110 m long running at the speed of 72 km/hr takes to cross a bridge 175 m length?