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marihelenh
 one year ago
A motorist drives 150 km from one city to another in 2.5 h but makes the return trip ikn only 2.0 h. What are the average speeds for (a) each half of the round trip and (b) the total trip.
marihelenh
 one year ago
A motorist drives 150 km from one city to another in 2.5 h but makes the return trip ikn only 2.0 h. What are the average speeds for (a) each half of the round trip and (b) the total trip.

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marihelenh
 one year ago
Best ResponseYou've already chosen the best response.1@triciaal @amistre64

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1what is your concept of an average speed?

marihelenh
 one year ago
Best ResponseYou've already chosen the best response.1What do you mean? I tried the problem and I got some answers, could you see if I am on the right path with this problem?

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1solutions start with knowing what it is you are looking for ... in this case, it wants an average speed.

triciaal
 one year ago
Best ResponseYou've already chosen the best response.0distance between the cities stays the same

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1we need to make sure we have a proper definition of average speed to get started

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1more accurately I would say average speed = (distance covered)/(time it took)

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1s (or speed) is an instantaneous measurement ...

marihelenh
 one year ago
Best ResponseYou've already chosen the best response.1dw:1440972635400:dw

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1those are fine for part a, assuming the mathing is correct, structure is fine

marihelenh
 one year ago
Best ResponseYou've already chosen the best response.1For part (b) then, could I do, \[\frac{ 150km +150km }{ 2.5h +2.0h }=\frac{ 300km }{ 4.5h }=66.6km/h=67km/h\]

marihelenh
 one year ago
Best ResponseYou've already chosen the best response.1That's reassuring. Thank you. Can you see if you can help me with another? I am not quite sure how to do it. I kind of get one part, but don't understand it completely.

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1i can put an eye to it ... then i might be able to determine how useful i can be

marihelenh
 one year ago
Best ResponseYou've already chosen the best response.1Ok, well just give me a minute.
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