kellyhurt3
Answered

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A and B can do a work in 3 days but A working alone takes 4 days. In what time will B do it if he works alone?

Could you help me. I'll give a heart and a brainliest to the one who helps me. If they write any nonsense, I will report them ;)

Sagot :

govdylan1

Answer:

Let B have x days work:

A + B = 3 days

1/4 + 1/x = 1/3

1/3 - 1/4 = 1/x

1/12 = 1/x

x = 1 / (1/12)

x = 12

B takes 12 days

I do not know if this is right

O O

v

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