SOLUTION: two cars left the same point at the same time and travel in opposite directions. The faster car travels 12 miles per hour faster than the other. If after 6 hours the cars are 648 k
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Question 1098039: two cars left the same point at the same time and travel in opposite directions. The faster car travels 12 miles per hour faster than the other. If after 6 hours the cars are 648 kilometres apart, what is the speed of each car? Found 2 solutions by ikleyn, josgarithmetic:Answer by ikleyn(52790) (Show Source):
Let x be the speed (the rate) of the slower car, in miles per hour.
Then the speed of the faster car is (x+12) mph.
The equation is
6x + 6*(x+12) = 648 ====>
6x + 6x + 72 = 648 ====> 12x = 648 - 72 = 576 ====> x = = 48.
Answer. The speed of the slower car was 48 mph. The speed of the faster car was 48 + 12 = 60 mph.
You can put this solution on YOUR website!
r, speed of slower car
p, a constant however necessary to either convert miles to kilometers; or from kilometers to miles. The car speeds are indicated for MILES per HOUR, but distance at given time was given in unit of KILOMETERS. Decide what you need.
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