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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 mow th class=

Respuesta :

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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