Cindy and John working together, can put the deck in 2 hours. Working alone John takes twice as long as cindy. How long does It take Cindy to paint the deck alone

Answer 1

1/c + 1/j = 1/2

1/c + 1/2c = 1/2

3/2c = 1/2

3/c = 1

c = 3 hours for cindy alone

6 hours for john alone

1/3 + 1/6 = 1/2