Respuesta :
Answer:
Step-by-step explanation:
By proportion it will be (5/3) * 12
= 60/3
= 20 days.
X= number of days taken if he uses 3 tractors
12×5=x× 3
60=3x
X= 60÷3
X= 20
20 days
12×5=x× 3
60=3x
X= 60÷3
X= 20
20 days