Question

working alone, aliyah can dig a 10ft by 10 ft hole is 6 hours. one day her friend eugene helped her and it only took 3.75 hours. how long would it take eugene to do it alone? disclaimer: the answer is 11.95 hours, but i keep getting 10. please use the 1/x+1/y=1/z strategy

Answer 1

I think the answer is 10 hours

the 11.95 seems wrong

Explanation:

`(1)/(6) + (1)/(y) = (1)/(3.75)`

multiply by 22.5 y

3.75 y + 22.5 = 6y

y = 10