Respuesta :

9 rooms / 3 rooms = 3

It will take him 3 times as long.

13 hours x 3 = 39 hours


answer: 39 hours

Answer:

39 hours

Step-by-step explanation:

13h = 3 rooms

3 x 3 = 9

13 x 3 = 3 x 3

39h = 9 rooms