SOLUTION: Leah drives 45 miles per hour for 2 hours, then 32 miles per hour for 75 minutes. What is her average speed for the whole trip?

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Question 934971: Leah drives 45 miles per hour for 2 hours, then 32 miles per hour for 75 minutes. What is her average speed for the whole trip?
Answer by vicgonzerx(31) About Me  (Show Source):
You can put this solution on YOUR website!
D1=DISTANCE 1=VELOCITY X TIME =45MILES/HR(2HRS)=90MILES
D2=DISTANCE 2=32MILES/HR(75MINS.X 1HR/60MINS.)= 40MILES
AVERAGE VELOCITY =TOTAL DISTANCE /TOTAL TIME
AV= (90+40)/(2+75/60)
AV=40 MILES/HR.......ANSWER