Problem

By himself, a person can mow his lawn in 48 minutes. If his daughter helps, they can mow the lawn together in 40 minutes. How long would it take his daughter to mow the lawn by herself?

Answer

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Answer

240 minutes is the time it would take the daughter to mow the lawn by herself.

Steps

Step 1 ：Let x be the time it takes for the daughter to mow the lawn by herself.

Step 2 ：Set up the equation: 148+1x=140

Step 3 ：Solve for x: x=240

Step 4 ：240 minutes is the time it would take the daughter to mow the lawn by herself.

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