Homework Help: math

Posted by carl on Friday, December 3, 2010 at 12:09pm.

One of your friends is heading north for the Christmas holiday and the other friend is heading south. If their destinies are 1029 miles apart and one car is traveling at 45 miles per hour and the other car is traveling at 53 miles per hour. How many hours before the two cars pass each other?

math - Henry, Saturday, December 4, 2010 at 9:55pm
d1 = r1*t = 45t,
d2 = r2*t = 53t,

d1 + d2 = 1029,
45t + 53t = 1029,
98t = 1020,

t = 1029 / 98 = 10.5 hours.

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