distance = speed * time, so we have
k = c+2
6k = 9(k-2)
3k = 18
k = 6
check:
6*6 = 4*9
Kathy and Cheryl are walking and running in a fundraiser. Kathy completes the course in 6 hours and Cheryl completes the course in nine hours. Kathy went on average two miles per hour faster than Cheryl. Find Kathy and Cheryl's speed.
1 answer