Question

Jennifer and Kamlee are walking to school. After 20 minutes, Jennifer has walked 4/5 miles. After 25 minutes, Kamlee has walked 5/6 miles. Find their speed in miles per hour

Answer 1

Jennifer's speed is 2.4 miles/hour

Kamlee's speed is 2 miles/hour

Explanation:

To find their speed,

Speed can be determined from the formula below,

`Speed = (Distance)/(Time)`

Also, to determine the speed in miles per hour (miles/hour), we will convert the time spent by each of them to hour (NOTE: 60 minutes = 1 hour)

For Jennifer,

Distance = 4/5 miles

Time = 20 mins (Convert to hour)

∴Time = (20/60) hour = 1/3 hour

Hence,

`Speed = (Distance)/(Time)`

`Speed = (4/5 miles)/(1/3hour)`

`Speed = (4)/(5) * (3)/(1)`

`Speed = (12)/(5)`

`Speed = 2.4 miles/hour`

Hence, Jennifer's speed is 2.4 miles/hour

For Kamlee,

Distance = 5/6 miles

Time = 25 minutes (Convert to hour)

Time = (25/60) hour = 5/12 hour

Hence,

`Speed = (Distance)/(Time)`

`Speed = (5/6miles)/(5/12 hour)`

`Speed = (5)/(6) * (12)/(5)`

`Speed = 2 miles/hour`

Hence, Kamlee's speed is 2 miles/hour