New Driver IQ Test

Discussion in 'Questions From New Drivers' started by Endzone, Jul 12, 2010.

Page 1 of 3
  1. Jul 12, 2010 #1
    Endzone

    Endzone Light Load Member

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    I want to find out if we have any smart truck drivers coming up into the profession. In the diagram below, a truck is moving along a level road at exactly 30MPH. As the truck goes up the hill, he maintains his speed at an average of 30MPH up the first 1/2 mile of the hill. What must be the average downhill speed in order to average 60MPH for his trip across the entire mile? Of course I realize no truck could probably do this, but theoretically speaking, what would his average downhill speed be for the last 1/2 mile in order to average 60MPH for the entire mile?

    This hill is perfectly symmetric although it isn't in my drawing.

    INCORRECT ANSWER: 90MPH


    [​IMG]​
     
    Endzone, Jul 12, 2010
    Endzone, Jul 12, 2010
    #1
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  3. Jul 12, 2010 #2
    Hardlyevr

    Hardlyevr Road Train Member

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    to average 60 miles per hour for the whole event, it would be 1 mile per minute, except in the 1st half of the trip, averaging 30mph for half a mile would take a minute, so now matter how much power Scotty gives you Captain, you ain't gonna average 60mph for the whole trip!
    However if you want to play semantics and median speed.....
     
    Hardlyevr, Jul 12, 2010
    Hardlyevr, Jul 12, 2010
    #2
    Endzone Thanks this.
  4. Jul 12, 2010 #3
    Palazon

    Palazon Road Train Member

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    120 mph down hill?

    omg.... don't ask me to do math at the end of a hard day...lol. I can't believe I typed that answer.
     
    Palazon, Jul 12, 2010
    Palazon, Jul 12, 2010
    #3
    johnday and AZ CATS Thank this.
  5. Jul 12, 2010 #4
    Jolsen

    Jolsen Heavy Load Member

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    X mph is the answer i got I think. but for me It would be 5 mph up and then 300mph down the hill
     
    Jolsen, Jul 12, 2010
    Jolsen, Jul 12, 2010
    #4
  7. Jul 12, 2010 #5
    scottied67

    scottied67 Road Train Member

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    Put me down for 180 miles per hour.
     
    scottied67, Jul 12, 2010
    scottied67, Jul 12, 2010
    #5
  8. Jul 12, 2010 #6
    AZ CATS

    AZ CATS Light Load Member

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    Yet it would be the correct one!!!!:biggrin_255:
     
    AZ CATS, Jul 12, 2010
    AZ CATS, Jul 12, 2010
    #6
  9. Jul 12, 2010 #7
    Endzone

    Endzone Light Load Member

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    Ft. Worth, TX
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    You nailed it Hardlyevr. It takes 1 minute to get to the top of the hill. So, the truck would have to travel instantaneously down the back, and that isn't about to happen. You smart guy.

    That was easy enough for you, now for your next challenge:

    http://www.thetruckersreport.com/tr...t-everything/115825-iq-test-for-truckers.html
     
    Endzone, Jul 12, 2010
    Endzone, Jul 12, 2010
    #7
  10. Jul 12, 2010 #8
    johnday

    johnday Road Train Member

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    Well, double huh!:biggrin_2559:
     
    johnday, Jul 12, 2010
    johnday, Jul 12, 2010
    #8
  11. Jul 12, 2010 #9
    Lilbit

    Lilbit Road Train Member

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    This stuff makes my brain hurt just looking at it!
     
    Lilbit, Jul 12, 2010
    Lilbit, Jul 12, 2010
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    Passin Thru Thanks this.
  12. Jul 12, 2010 #10
    Passin Thru

    Passin Thru Road Train Member

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    I'd say, Go United and a steady 530 MPH, avoid all the uphill-downhill. Let the flight computer figure out the optimum climb and descent speed.
     
    Passin Thru, Jul 12, 2010
    Passin Thru, Jul 12, 2010
    #10
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