Question

if a piece of sea floor has moved 50 km in 5 million years what is the yearly rate of sea-floor motion?

Answer 1

50 km = 50,000 meters

(50,000 meters) / (5 million years)

= (5 x 10⁴) / (5 x 10⁶) (meters/year)

= 1 x 10⁻² meter/year

= 1 centimeter per year

Answer 2

0.0001 km / year or 10^-5 km/year just take 50 km and divide it by 5 million