Choose the one alternative that best completes the statement or answers the question.
-The JUST-SAY-MOW lawn mowing company consists of two people: Marsha and Bob. If Marsha cuts the lawn by herself, she can do it in 3 hours. If Bob cuts the same lawn himself, it takes him an
Hour longer than Marsha. How long would it take them if they worked together? Round to the
Nearest hundredth of an hour.
A) 4.00 hours
B) 1.71 hours
C) 3.50 hours
D) 1.00 hour

Question

Quizplus · Accepted Answer

Marsha takes 3 hours, and Bob takes 4 hours (since it's an hour longer than Marsha). To find the time it takes for them to work together, we use the formula for combined work rates: 1/(1/3 + 1/4) = 1/(4/12 + 3/12) = 1/(7/12) = 12/7 hours, which is approximately 1.71 hours.

Choose the One Alternative That Best Completes the Statement or Answers