Question

A plate moves 200 m in 10,000 years. What is its rate in cm/year?

Answer 1

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