Answered

Maria drives her car for 1 1/2 hours with a constant speed of 65 km/h and then for another 60 minutes with a constant speed of 85 km/h. What was her average speed?
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Sagot :

Alexbanque123viz

averag speed = (initial speed + final speed)/2  

= (65 + 80)/2  

= 72.5 km/h

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