Answer:
21:50
Step-by-step explanation:
We need to find the ratio of 420 m to 1 km.
We know that,
1 km = 1000 m
So,
The ratio becomes,

So, the required ratio is 21:50.
 
        
             
        
        
        
I believe the answer to your question is three you have to be three usually always three
        
             
        
        
        
Answer:
18 x 6 =108. she spent 108 minutes reading.
Step-by-step explanation:
 
        
             
        
        
        
Its 40% because its just the fact ratio you know