Ask Question
2 January, 17:22

If John can mow the lawn in 2/3 of an hour and George can mow the lawn in 1 hour, how long will they take to mow the lawn together? 2/5 of an hour 3/5 of an hour 3/4 of an hour

+4
Answers (1)
  1. 2 January, 17:46
    0
    This is esay to do when you realize the the speed of mowing is addtive. This is if John mows at 1 lawn / (2/3) hour and Gerge mows at 1 lawn / 1hour, the total speed of mowing is:

    1 / (2/3) + 1 = 3/2 + 1 = 5/2

    => 5/2 of lawn per hour

    Now, the time is calcualted as the amount of lawn divided by the speed:

    1 lawn / (5/2 lawn/hour) = 2/5 hour.

    Answer: 2/5 of an hour.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “If John can mow the lawn in 2/3 of an hour and George can mow the lawn in 1 hour, how long will they take to mow the lawn together? 2/5 of ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers