SOLUTION: jack and jill both left the house at 3:30pm. jack went east and jill went west.jack drove 30mph faster than Jill did. At 6pm they were 275 miles apart. How fast were each of them d
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Question 990147: jack and jill both left the house at 3:30pm. jack went east and jill went west.jack drove 30mph faster than Jill did. At 6pm they were 275 miles apart. How fast were each of them driving Answer by macston(5194) (Show Source):
You can put this solution on YOUR website! .
275mi/2.5hrs=110 mi/hr
Their combined speed is 110 mph.
.
J=Jill's speed ; A=Jack's speed=J+30mph
J+A=110mph
J+J+30mph=110mph
2J=80mph
J=40mph
ANSWER 1: Jill's speed is 40 mph.
A=J+30mph=40mph+30mph=70mph ANSWER 2: Jack's speed is 70 mph.
