SOLUTION: Rachel drives at a rate of 40 miles per hour for 3 hours on a country road and then drives for 2 hours at a rate of 55 miles per hour on a highway. What was her average speed, in
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Question 309977: Rachel drives at a rate of 40 miles per hour for 3 hours on a country road and then drives for 2 hours at a rate of 55 miles per hour on a highway. What was her average speed, in miles per hour, for the entire trip?
(A)45 (B) 46 (C) 47.5 (D) 50 (E) 51
You can put this solution on YOUR website! 40 mph for 3 hours.
she travels 120 miles
.
.
55mph for 2 hours
she travels 110 miles
.
Total distance traveled = 120+110 = 230 miles
total time taken = 5 hours
Average speed for total journey = 230/5
= 46 miles/hr
