Question 1199192
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30 min = 30/60 = 0.5 hours


We'll use rate and time to find the distance.
distance = rate*time
distance = (35 mph)*(0.5 hr)
distance = 17.5 miles


Now use the faster speed to determine how long it would take. 
This assumes you drive the same distance.


distance = rate*time
time = distance/rate
time = (17.5 miles)/(40 mph)
time = 0.4375
That's the amount of time in hours.


Multiply by 60 to find its corresponding time in minutes.
0.4375*60 = 26.25


Answer: <font color=red>26.25 minutes</font>
This is equivalent to 26 minutes + 15 seconds, because 0.25 minutes = 0.25*60 = 15 seconds.
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