A train is 300 meter long is running at a speed of 54 km/hour. In what time will it pass a tunnel of 1200 meter length?  Choose the correct choice from the following answers:
A) 90 seconds	B) 85seconds	C) 40 seconds	D) 100 seconds	E) 120 seconds
Speed = 54 Km/hr = 54*(5/18) m/sec = 15 m/sec   Total distance = 300+1200= 
<gadget id="calculator">300+1200</gadget>
<output>1_500</output>
1500 meter   Time= 100 secondsistance/speed   = 1500 * (15) = 100 seconds   Answer: 100 seconds
<result>D</result>
A train is 300 meter long is running at a speed of 54 km/hour. In what time will it pass a tunnel of 1200 meter length?