In how many seconds will a train 150 meters long pass an oak tree, if the speed of the train is 54 km/hr?  Answers.
A) 6	B) 8	C) 10	D) 12	E) 14
speed = 54 * 5/18= 
<gadget id="calculator">54 * 5/18</gadget>
<output>15</output>
15 m/s   time= 150/15= 
<gadget id="calculator">150/15</gadget>
<output>10</output>
10 seconds   The answer is 10.
<result>C</result>
In how many seconds will a train 150 meters long pass an oak tree, if the speed of the train is 54 km/hr?