Ask Experts Questions for FREE Help !
Ask
    outlooked's Avatar
    outlooked Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Aug 5, 2008, 11:08 AM
    How to find average speed?
    I go to kumon and I have question that says... A car takes 7 hours and 50 minutes to travel 549 and 9/10(9 over 10)km. What is the average speed of the car in km per hour?

    The second part to the question is how many minutes will it take the car to travel 19 and 1/5 km
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
    Expert
    		  
    #2

    Aug 6, 2008, 07:17 AM
    The average speed is calculated by taking the distance traveled and dividing by the time it takes. The only complication is that you need to convert 7 hours and 50 minutes into hours. 50 minutes is 50/60 of an hour, or 0.. 8333 hours. So the total time is 7.333 hours. Hence you have 549.9 KM divided by 7.333 hours.

    Once you have the average speed, the time it takes to travel a certain distance is determined by time = distance/speed. You have the speed in kilometers per hour, so you need to convert it to kilometers per minute.

    Post back if you have any further questions.
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
    Uber Member
    		  
    #3

    Aug 8, 2008, 04:00 AM
    Hey, just remember that average speed is total distance over total time, OK?

    By juggling with this equation, you may find any of these (ie total time, total distance or average speed) if you are given the other values, in the second part of your question.
    ryan142's Avatar
    ryan142 Posts: 1, Reputation: 1
    New Member
    		  
    #4

    Nov 17, 2010, 12:29 AM
    to calculate speed,you will need to consider any of the following combination of units for distance with respect to time: kilometers per hour (km/h) centimeter per second (cm/s) meter per second (m/s) or even centimeter per day (cm/day)
    to compute speed scientist came up with
    distance d
    Speed=------------------- v=---------
    time t
    the formula may be written by simply using the letters v to represent speed d for distance and t for time
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search


Check out some similar questions!

Average speed [ 7 Answers ]

Students make the trip to Los Angeles at an average speed of 40mph and the trip back at an average speed of 60 mph. Find their average speed for the entire trip. (It's Not 50 mph) Please help me answer this question and if possible, can u show the steps of solving it. Thank You so much.

Average Speed [ 3 Answers ]

A body covers half a distance with a speed of 20m/s and the other half with a speed of 30m/s.Find the average speed of the whole journey?

How do I find the average speed? [ 1 Answers ]

:p how can I find the average speed I DON'T GET IT!! AHHHHHHH

Average Speed [ 1 Answers ]

How to calculate average speed if distance & speed is given

Speed average [ 1 Answers ]

A bicyclist rides up a 10 mile hill at a constant speed of 10 MPH. He arrives at the top and heads down to the bottom at a constant speed of 30 MPH What is his average speed for the round trip?

View more questions Search