Question

It takes Zion three times as long to paint a room as it does Sanjay. How long does it take each person by

himself if they can paint the room together in 30 minutes?

Answer 1

It takes Sanjay 40 minutes and Zion 120 minutes

Explanation:

If it takes Sanjay x minutes, it takes Sanjay 3 * x = 3x minutes

Painting together, they spent 30 minutes

1/x + 1/3x = 1/30

4/3x = 1/30

4 * 30 = 3x * 1

120 = 3x

x = 120/3

x = 40 minutes

3x = 3 * 40 = 120 minutes