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Brad and Angelina can mow their yard together with two lawn mowers in 20 min
. When Brad works alone, it takes him 30 min. How long would it take Angelina to mow the lawn by herself?
It takes Angelina_______ min to mow the lawn by herself.

Brad and Angelina can mow their yard together with two lawn mowers in 20 min . When Brad works alone, it takes him 30 min. How long would it take Angelina to mo class=

Answer :

Answer:

Let A = Angelina's timeLet

B = Brad's time 20

(1/A + 1/B) = 1 B = 30 20(1/A + 1/30) = 11/A + 1/30 = 1/201/A = 1/20 -1/301/A = 1/60A = 60 minutes for Angelina to do the lawn alone

Step-by-step explanation:

I hope this helped :)

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