Two typists of can do a work in 6 minutes if they work together. If the 1st typist typed alone for 4 minutes and then the 2nd typist typed alone for 6 minutes, they would be left with 1/5th of the total work. How many minutes would it take to complete the slower typist to complete the typing job working alone? (In minutes)
Two typists of can do a work in 6 minutes if they work together. If the 1st typist typed alone for 4 minutes and then the 2nd typist typed alone for 6 minutes, they would be left with 1/5th of the total work. How many minutes would it take to complete the slower typist to complete the typing job working alone? (In minutes)
1
10
2
12
3
15
4
20
5
25