SOLUTION: Sam drives to his office every day. He drives first half of the distance @ 40 miles / hr and the second half, he drives at 60 miles/hr. He takes 2 hours to reach his office. How

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: Sam drives to his office every day. He drives first half of the distance @ 40 miles / hr and the second half, he drives at 60 miles/hr. He takes 2 hours to reach his office. How      Log On

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Question 962290: Sam drives to his office every day. He drives first half of the distance @ 40 miles / hr and the second half, he drives at 60 miles/hr. He takes 2 hours to reach his office. How far is his office from his home?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
_________________rate_________time___________distance
part1____________40___________(___)____________d/2
part2____________60___________(___)____________d/2
Totals_________________________2_______________d

RT=D, basic uniform rate rule for travel, RATE, TIME, DISTANCE

_________________rate_________time___________distance
part1____________40___________(d/2)/40_________d/2
part2____________60___________(d/2)/60_________d/2
Totals_________________________2_______________d

The sum equation for the time quantities can be solved for d.
%28d%2F2%29%2F40%2B%28d%2F2%29%2F60=2;
simplify, solve.