Question

mr.stone started from home on a trip, planning to average 30mph. how fast must his son carl plan to travel in order to overtake him in 3 hours if carl started 30 minutes after his father?

Answer 1

3 hours from the time his son leaves?

Answer 2

his son leaves 30 minutes later so mr stone has already gone 15 miles, then in another 3 hours he will go \(3\times 30=90\) miles for a total of 105 miles
his son now has 3 hours to go 105 miles so his rate has to be \(\frac{105}{3}=35\)

Answer 3

thank you!

Answer 4

yw