It takes Maria 11 mins to weed a garden. Mike can weed the same garden in 10 minutes. How long would it take them if they work together? - I got 21 mins but i honestly don't know how to round it.

Question

saifoo.khan · Answer

$$\frac 1x =\frac{1}{10}+\frac{1}{11}$$

saifoo.khan · Answer

1/10 = Mike's part.

1/11 = Maria'a part.

1/x = time it will take if both will work.

anonymous · Answer

Alright and so then i would find the common denominator and then solve for the x?

hba · Answer

Now take the lcm,cross multiply and get to x.

saifoo.khan · Answer

Yes.

anonymous · Answer

I got 120/110. do i divide 110 by 120 and turn it into a decimal?

saifoo.khan · Answer

Nope/

anonymous · Answer

-.- okay so for my lcd i did 11 by 10. then okay i messed up my adding. it should be 21/110

saifoo.khan · Answer

1/x = 21/110

anonymous · Answer

then i would multiply the 1 and that would isolate the x. leaving me with the 21/110 and then i simplify it?

saifoo.khan · Answer

x is in the denominator currently. Do something to bring it to the numerator.

anonymous · Answer

multiply the 110 to the top and bottom. I would get 110 over 110x?

hba · Answer

See this,

$$\frac{ 1 }{ a }=\frac{ 11 }{ 10 }$$

$$a=\frac{ 10 }{ 11 }$$

saifoo.khan · Answer

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