Question

Miss Hilton drives for 5 hours at an average speed of 35 miles per hour. Then she drives for 3 hours at a speed of 45 miles per hour. What is her average speed for the whole trip?

Answer 1

Answer:

1 hour = 35 miles

then 5 hours= 5×35= 175 miles

then 1 hour= 45 miles

then 3 hours= 3×45= 135 miles

now total hours= 8 hours

then the average speed for the whole trip= 175 miles+ 135 miles÷ 8 hours

(175 + 135) miles÷ 8 hours

310 miles÷ 8 hours

38.75 miles

I hope it's helpful to you