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Checking Speed and Velocity Problems

  1. Sep 22, 2013 #1
    1. The problem statement, all variables and given/known data
    I have four separate problems.

    1.A certain boat cruises at 32 km/h. How long does it take the boat to travel 25 kilometers?

    2. A person runs at a speed of 8.0 mi/h for 140 minutes. How far does the person travel?

    3. A man is at sea on a raft, adrift on the ocean current. The current carries him 51 miles in 3 days. At this speed, how long would it take him to travel 400 miles?

    4. A man competing in a bicycle race travels 57 km in 3.0 hours. If he maintains this average speed, how far will he go in 8.0 hours?

    2. Relevant equations
    T=x/v


    3. The attempt at a solution

    I have answered all of them, but would like to check them one more time before I turn them in. Here are my answers:

    1. 47 minutes.
    2. 18 miles.
    3. 23 days.
    4. 152 km.
     
  2. jcsd
  3. Sep 22, 2013 #2

    Andrew Mason

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    Science Advisor
    Homework Helper

    You appear to be rounding down too soon in 2 and 3. Other than that, your calculations are correct.

    AM
     
  4. Sep 22, 2013 #3
    Thank you! So your suggestion is that I should go back to where I divided and round up?
     
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