Question

It takes Sally 4 hours to deliver newspapers. If Kathy works alone, it takes her 6 hours. How long would it take them working together to deliver all of the newspapers?

Answer 1

(x/4)+(x/6)=1

Answer 2

4x+6x=24
10x=24
x = 24/10
x =2.4 hours

Answer 3

x newspapers--- 4hrs x/4 newspapers in 1 hr
x news papers--- 6 hrs x/6 news papers per hr
let total time be t
total news papers to be delivered again=x
(x/4)*t+(x/6)*t=x
dividing by x
t/4+t/6=1

Answer 4

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