Asked by Anonymous
Mr. Smith drove 90 miles one way to visit his brother. He averaged twice his original speed on the return trip than he did going to visit. If his total travel time was 3 hours, how fast was he going each way
Answers
Answered by
Steve
since time = distance/speed, if his original speed was x,
90/x + 90/(2x) = 3
x = 45
90/x + 90/(2x) = 3
x = 45