1) Mio can build a large shed in 15 days less than Yuuko can. If they build it together, it would take them 18 days. How long would it take each of them working alone?

Question

2) If Kamina can do a job in 29 hours and Simon and Kamina working together can do the same job in 10 hours, find how long it takes Simon to do the job alone.

Answer 1

#1
1/(y-15) + 1/y = 1/18
y = 45
so, m = 30

#2
1/29 + 1/s = 1/10
s = 15.26
odd answer. Typo?