A train having a length of 1/4 mile , is traveling at a speed of 75 mph. It enters a tunnel 3 ½ miles long. How long does it take the train to pass through the tunnel from the moment the front enters to the moment the rear emerges?  Pick one
A) 1 B) 2 C) 4 D) 5 E) 3
Total distance = 3 ½ + ¼ = 7/2 + ¼ = 15/4 miles   Speed = 75 mph   Time = distance/speed = (15/4) / 75 hr = 1/20 hr = 60/20= 
<gadget id="calculator">60/20</gadget>
<output>3</output>
3 minutes   Answer is 3.
<result>E</result>
A train having a length of 1/4 mile , is traveling at a speed of 75 mph. It enters a tunnel 3 ½ miles long. How long does it take the train to pass through the tunnel from the moment the front enters to the moment the rear emerges?