Answer:
2cm/year
Explanation:
10,000 years = 200m
The question asks, what is its rate in cm per year?
So first we have to make sure the units are the same, i.e by changing the metres(m) to centimetres(cm)
1m = 100cm
200m = (200x100) 20,000 cm
10,000 years = 20,000 cm
Now we divide the latter by the former. (cm/year) i.e, years by centimetres
20,000 ÷ 10,000 = 2
