Problema Solution
How long (in minutes) will it take a 400-mile road trip take at 70 miles per hour? Round your answer to the nearest minute.
Answer provided by our tutors
let
d = 400 mi the distance
v = 70 mph the average speed
t = the time
since v = d/t follows t = d/v
t = 400/70
t = 40/7
t = 5 5/7 hr
t = 5 hr 5*60/7 min
t = 5 hr 43 min
t = 5*60 + 43
t = 343 min
the trip will take 343 minutes.