Question

Bradley went on a bike ride to the store 6 miles away. If it took Bradley 3/8 of an hour to get there and 1/4 of an hour to get back, what was his average rate of speed (miles per hour) for the entire trip?

Answer 1

19.2 or 19.20 or 96/5

Answer 2

Bradely's average speed is 14.4 miles per hour.

Explanation:

Average Speed tells the rate at which object is travelling his whole journey.

`Average\ Speed\=\ (Total\ distance\ traveled)/(Total\ time\ taken)`

∴
`Average\ Speed=(6 + 6)/((3)/(8)+(1)/(4))`

⇒
`Average\ Speed=(12)/((3+2)/(8))`

⇒
`Average\ Speed=(12)/((5)/(8))`

⇒
`Average\ Speed=(12)/(5)* 8`

⇒ Average Speed = 14.4 miles per hour

Thus, Bradely's average speed for traveeling his whole journey is 14.4 miles per hour.