Tom and his grandfather live 12 miles apart. If tom walks at 4 miles an hour and
ID: 3096715 • Letter: T
Question
Tom and his grandfather live 12 miles apart. If tom walks at 4 miles an hour and his grandfather at 12 miles per hour, then how much sooner than Tom should his grandfather leave if they are to meet each other at the halfway point at the same time?please ans. quickly! will rate asap!
Explanation / Answer
The midpoint between them is 6 miles that they both travel. The grandfather is traveling 12m/h, so 12(miles/hour)x=6(miles) -> (halfway point) so x=1/2 hour, or 30 min. Tom is going 4m/h, so 4(m/h)x=6(miles) -> so x=3/2 hour or 90 minutes. The grandfather will take 30 min to the halfway point and so Tom needs to leave 90-30= 60 minutes earlier.