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Vesnalui [34]
4 years ago
9

Max can mow a lawn in 45 minutes. Jan takes twice as long to mow the same lawn. If they work together, how long will it take the

m to mow the lawn?
a.15.0 minutes
b.22.5 minutes
c.30.0 minutes
d.120.0 minutes
Mathematics
2 answers:
Licemer1 [7]4 years ago
5 0

Answer:

  c.  30.0 minutes

Step-by-step explanation:

Max mows 1/45 lawns per minute.

Jan takes twice as long (90 minutes per lawn), so mows 1/90 lawns per minute.

Working together, they mow ...

  (1/45 + 1/90) lawns per minute = (2/90 +1/90) lawn/min = 3/90 lawn/min

  = 1/30 lawn/min

Then for one lawn, it takes ...

  (1 lawn)/(1/30 lawn/min) = 30 min

Free_Kalibri [48]4 years ago
5 0

Answer:

A

Step-by-step explanation:

30 min

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3 years ago
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