It takes two hours for a person x to mow the lawn. Y can mow the same lawn in four hours. How long (in minutes) will it take x and y, if they work together to mow the lawn?
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Convert hours into minutes.
X's work= 120 minutes
X's one minute work=1/120
Y's work = 240 minutes
Y's one minute work=1/240
Time taken for X and Y to mow the lawn=
1/120+1/240
=3/240
Therefore, time taken=80 minutes
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