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

0.02 cm/year
2 cm/year
10 cm/year
100 cm/year

1 answer

To find the rate of movement in centimeters per year, we need to first convert the distance from meters to centimeters, and then divide it by the number of years.

  1. Convert the distance from meters to centimeters: \[ 200 \text{ m} = 200 \times 100 \text{ cm} = 20,000 \text{ cm} \]

  2. Now, divide the distance by the time in years: \[ \text{Rate} = \frac{20,000 \text{ cm}}{10,000 \text{ years}} = 2 \text{ cm/year} \]

Thus, the rate is 2 cm/year.