The driving time varies inversely with the speed of the car if a certisn trip takes 40 min utes when you travel 50 miles per hour how many minutes would it take if u travel 40 miles per hour

The value is    

Step-by-step explanation:

From the question we are told that

   The driving time varies inversely with the speed of the car

   The amount of time a trip at a velocity of  takes is minutes

Let

 v represent the velocity

while t represent the time

So  

=>    

=>    

=>  

From the question we are given   and we are told to find

So

=>        

=>      

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.