Jake can paint a room in 6 hours. Sam can do it twice as fast. How long will take if they work together?

Question

I will like to know if I'm using the correct equation

t/6 + t/3 = 1

18( t/6 + t/3 = 1)

3t + 6t = 18

9t = 18

t = 2 hours

Answer 1

Jake's rate is 1/6.

Sam's rate is 1/3

(1/6)x + (1/3)x = 1

3x + 6x = 18

9x = 18

x = 2 hours

In 2 hours, Jake has painted 2/6 of the house and in two hours, Sam has paited 4/6 of the house.