Question

If Alan and Zack can clean a room in 30 minutes when working together, and Alan cleans twice as fast as Zack, how long would it take Alan to clean the room by himself?

Answer 1

Answer:

alan will clean it in 20

Step-by-step explanation:

Well, we know that

a:z

is

2:1

which is also 1/2

so z is 0.5 and A is 1.5

so then we do 30*0.5 which is 15 and 30/1.5 which is 20