Problema Solution
Kent drives his Mazda 200 miles in the same time that it takes Dave to drive his Nissan 180 miles. If Kent averages 5 miles per hour faster than Dave, find their rates.
Answer provided by our tutors
let speed of Kent = x mph and speed of Dave = (x-5) mph
200/x = 180/(x-5)
200x-1000 = 180x
20x = 1000
x = 50
hence speeds of Kent and Dave are respectively are 50 and 45 mph