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AnnZ [28]
3 years ago
8

The time t required to drive a centain distance varies inversely with the speed r. If it takes 2 hours to drive the distance at

30 mines per hour how long will it take to drive the same distance at 50 miles per hour
Mathematics
1 answer:
Romashka [77]3 years ago
3 0
An inversely proportional equation for our set of circumstances looks like this:  t= \frac{k}{r}.  We have a t value of 2 and an r value of 30, so we will sub those values in and solve for k, the constant of variation.  2= \frac{k}{30}.  Multiply both sides by 30 to get that k = 60.  Now we need to find t when r = 50.  We can do this now because we have a value for k.  t= \frac{60}{50}  and t = 1.2 hours.
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