Question

Niles and Bob sailed at the same time for the same length of time. Niles' sailboat traveled 45 miles at a speed of 9 mph, while Bob's motorboat traveled 70 miles at a speed of 14 mph. For how long were Niles and Bob traveling?

Answer 1

speed = distance/time (formula)
Nile- 9/1= 45/?
Bob-14/1=70/?
9*5=45
14*5=70 so
1*5= 5 hours(for Nile)
1*7= 7 hours(for bob)