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

    Sep 28, 2013, 04:45 AM
    Find the average speed?
    A man travels 5km at the speed of 20kmph... from there he travels 20km at the speed of 40kmph.. what's the average speed?
    15yearoldgirl's Avatar
    15yearoldgirl Posts: 49, Reputation: 5
    Junior Member
    		  
    #2

    Nov 9, 2013, 04:44 PM
    Start by finding the time each part takes as this is a value you can add, unlike the speeds:
    Time = Distance/Speed
    5/20 = 0.25 hours = 15 minutes
    20/40 = 0.5 = 30 minutes
    Total distance = 25 km
    Total time = 0.75 hours = 45 minutes
    Speed = Distance/Time
    Average speed = 25/0.75
    Average speed = 33.3 kmph
    If you need the answer in a different unit you will have to convert FIRST. Hope this was helpful.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

How to find average speed when given distance and speed [ 1 Answers ]

A covered 240km at 60km/h and 80km at 100km/h and 200km at 50km/h.what is the average speed during the whole journey

How to find average speed? [ 3 Answers ]

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

How to find average speed with given speed and distance [ 3 Answers ]

Suppose you go 75 mph for 53 miles, 55 mph for 21 miles and 35 mph for 3 miles... what is your average speed?

How to find final speed when initial speed and average speed is given [ 5 Answers ]

a car travels a certain distance with a speed of 40m/s and returns with a speed 'u'. If the average speed for the whole journey is 48m/sec what is the value of'u'?

How do you find the average speed! [ 2 Answers ]

Ok I'm like dying trying to find out how to find the average speed of this problem "We drobe 60 miles to vist our friends. Then we drove 60 miles back. On our way there we drove at a speed of 60 miles per hour. On the way back we drove at a speed of 30 miles per hour. What was our average speed for...

View more questions Search