Sam can mow a lawn in 20 min, while Mark takes 10 min longer to mow the same lawn. How long will they take to mow the lawn if they work together?

1. Sam can mow a lawn in 20 min, while Mark takes 10 min longer to mow the same lawn. How long will they take to mow the lawn if they work together?

[Assistant Programmer 2016 [MCQ] : 2016]

1. 12 min

2. 14 min

3. 15 min

4. more than 15 min

Answer

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