Problema Solution
Dan must deliver a customer order that is 16 miles away. Dans leaves the store at 4:47 and drives an average speed of 40 miles an hour. What time will he arrive back to the store
Answer provided by our tutors
let
v = 40 mph the avg. speed of Dan
d = 16+16 = 32 mi the distance traveled back and forth
t = the time of the travel
since the average speed = distance/time we have
v = d/t
t = d/v
t = 32/40
t = 0.8 hr
t = 0.8*60 min
t = 54 min
54 minutes after 4:47 is 5:41.
Dan arrives back at the store at 5:41.