A rocket car on the bonneville salt flats is traveling at a rate of 640 miles per hour. How much time would it take for the car to travel 384 miles at this rate?
d = r t
384 = 640 t
384/640 = t
.6 = t .6 of an hour
.6 hr 60min/1 hr = 36 minutes (just in case it needs to be in minutes)
Answer:
0.6 hour or 36 minutes
Step-by-step explanation:
We can use proportion to solve this problem.
640 miles = 1 hour
384 miles = x
cross-multiply
640 x = 384
Divide both-side of the equation by 640
\(\frac{640x}{640}\) = \(\frac{384}{640}\)
(On the left-hand side of the equation 640 at the numerator will cancel-out 640 at the denominator, while on the right-hand side of the equation 384 will be divided by 640)
x = \(\frac{384}{640}\)
x = 0.6 hour
or
x = 0.6×60 = 36 minutes
Therefore the time it would take the car to travel 384 miles is 0.6 hour or 36 minutes