SOLUTION: if you go 126 km/h for 30 minutes then go 100 km/h for 45 minutes what is your average speed

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Question 345325: if you go 126 km/h for 30 minutes then go 100 km/h for 45 minutes what is your average speed
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Rate*Time=Distance
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R%2At=D
Convert all times to hours.
30 minutes=1/2 hr
45 minutes=3/4 hr
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D%5B1%5D=126%281%2F2%29=63 km
D%5B2%5D=100%283%2F4%29=75 km
D=D%5B1%5D%2BD%5B2%5D
D=63%2B75
highlight%28D=138%29 km
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t=t%5B1%5D%2Bt%5B2%5D
t=2%2F4%2B3%2F4
highlight%28t=5%2F4%29 hr
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V%5Bave%5D=D%2Ft=138%2F%285%2F4%29
highlight_green%28V%5Bave%5D=110.4%29 kph