SOLUTION: Pair of marking, a set distance apart, are made on highways so that police can detect drivers exceeding the speed limit. Over a fixed distance, the speed R varies inversely with t
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Question 983330: Pair of marking, a set distance apart, are made on highways so that police can detect drivers exceeding the speed limit. Over a fixed distance, the speed R varies inversely with the time T. For one particular pair of markings, R is 56 mph when t is 9 seconds. Find the speed of a car that travels the given distance in 8 seconds. Answer by Cromlix(4381) (Show Source):
You can put this solution on YOUR website! Hi there,
R varies inversely with the time T.
R = k/T
To find k the constant of proportionality
R = k/T
56 = k/9
Cross multiply
k = 9 x 56
k = 504
Formula: R = 504/T
Find the speed of a car that travels
the given distance in 8 seconds.
R = 504/T
R = 504/8
R = 63mph.
Hope this helps:-)
