Mike Travels 6 hours at an average rate of 80 kilometers per hour. Find the time required to travel the same distance if mikes averavge rate were 90 kilometers per hour.
how do i set this problem up?
2007-11-15 15:26:07 · 3 answers · asked by GREEN2030 1 in Science & Mathematics ➔ Mathematics
Speed = distance / time
(This is the definition of speed)
Start by finding the distance from the trip where you know the speed and the time:
80 km/h = X km / 6 hours
X = 480 km
For the new trip at the new speed, the distance will be the same:
90 km/h = 480 km / Y hours
2007-11-15 15:30:17 · answer #1 · answered by Raymond 7 · 0⤊ 0⤋
Distance = 480
speed = 1) 80 2) 90
time 1) 6 hours
easy way take distance and divide it by speed = hours so 480 (distance) divide it by 90 equals about 5.33333 hours or so
2007-11-15 15:36:46 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Ahh calculus ahh.
2007-11-15 15:29:43 · answer #3 · answered by Anonymous · 0⤊ 0⤋