jack usually mows his lawn in 4 hours mariltn can mow the same yard in 7 hours how much time would it take for them to mow the lawn together
In 28 hours, Jack can do 7 lawns, and mariltn can do 4, so combined, in 28 hrs, they can do 11 lawns.
rate combined: 11/28 lawns per hour
time= 1lawn/rate= 28/11 hours.
To determine how much time it would take for Jack and Mariltn to mow the lawn together, we can use the concept of work rates.
First, we need to calculate their individual work rates. Jack takes 4 hours to mow the lawn, so his work rate is 1/4 of the lawn per hour. Mariltn takes 7 hours to mow the same yard, so her work rate is 1/7 of the lawn per hour.
To find their combined work rate, we can add their individual work rates together.
1/4 + 1/7 = 7/28 + 4/28 = 11/28
Their combined work rate is 11/28 of the lawn per hour.
To determine how long it would take them to mow the lawn together, we can take the reciprocal of the combined work rate.
1 / (11/28) = 28/11
Therefore, it would take them approximately 2 and 7/11 hours (or about 2 hours and 38 minutes) to mow the lawn together.