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.
Answer:
23000
Step-by-step explanation:
Answer:
c is the answer
Step-by-step explanation:
solution




therefore the equation is not true