# math

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I have trouble solving word problems. Can you help me solve this problem?

If Sally can paint a house in 4 hours, and John can paint the same house in 6 hours, how long will it take both of them to paint the house together?

• math -

http://www.jiskha.com/display.cgi?id=1226828150

• math -

How did you get 10/24 then 24/10?

• math -

Remember: when dividing fractions, it is the same as multiplying by the inverse.

s/(b/c)= ca/b

so
1/(10/24)= 24/10

• math -

How did you get 10/24? Are you adding the fractions by useing the lease common denominator?

• math -

Yes.

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