Trisha rides her bike 5 miles on Saturday in 30 minutes. She rides another 13 miles in one hour. What is the average rate of her speed on Saturday?
18/1.5 = x/1
Cross multiply and solve for x.
18/1.5x=12
Correct.
To find the average rate of Trisha's speed on Saturday, we need to calculate her total distance traveled and divide it by the total time taken.
First, let's calculate the total distance Trisha traveled. She rode 5 miles on Saturday morning and an additional 13 miles later in the day. Therefore, her total distance is 5 + 13 = 18 miles.
Next, let's calculate the total time Trisha took. She rode for 30 minutes in the morning and 1 hour in the later part of the day. Since there are 60 minutes in 1 hour, her total time is 30 + 60 = 90 minutes, or 1.5 hours.
Finally, to calculate the average rate of her speed, we divide the total distance (18 miles) by the total time (1.5 hours):
Average speed = Total distance / Total time
Average speed = 18 miles / 1.5 hours
Average speed = 12 miles/hour
Therefore, the average rate of Trisha's speed on Saturday is 12 miles per hour.