Jill can mow the lawn in 2 hours, Bob can mow the same in 3 hours.

How long will it take them to mow the lawn together?
in Word Problem Answers by Level 1 User (280 points)

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rate 1=(1/2 ours)=0.5... rate 2=(1/3 ours)=0.333333333333333... sum av rates =0.83333333.......... time for 2 werk in parallel=1/0.833333333333 time=1.2 ours
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