How long (in minutes) will a 400-mile road trip take at 70 miles per hour? Round your answer to the nearest minute.

Question

1 hour equal 60 minutes

Answer 1

400 mile trip

 

driving at 70 mph

 

time taken is 400/70 = 5.714 hrs.

 

5.714 hrs (60 min./hr.) = 342.86 min.

Answer 2

distance (d) = velocity (v) x time (t)

 

d = vt ⇒ t = d/v

 

d = 400 miles

 

v = 70 miles per hour = 70 miles per 60 minutes

 

v = 70/60 miles per minute = 1.167 miles per minute

 

t = d/v = 400 miles / (1.167 miles/minute) ≅ 343 minutes