The Distance of the Atlantic Ocean from the Eastern Coast of the U.S. to the Western Coast of Africa is 4,550 km. The Average rate of spreading from the mid-Atlantic ridge is 2.5 cm/year.
How Old is the Atlantic Ocean?

Question

The Distance of the Atlantic Ocean from the Eastern Coast of the U.S. to the Western Coast of Africa is 4,550 km. The Average rate of spreading from the mid-Atlantic ridge is 2.5 cm/year.
How Old is the Atlantic Ocean?

jdoe0001 · Answer

how many centimeters in 4,550kms?

jdoe0001 · Answer

the mid-atlantic ridge spreads 2.5cm per year
so if from coast to coast  is 4,550km

then divide that by 2.5cm and what's left is how many years old is the atlantic ocean

anonymous · Answer

About 182000000 (One hundred and Eighty-two Million) years old.
My Data:
Size:- 4550 km
Expansion Rate:- 2.5cm/year

Calculations(Assuming that the ocean started from a point '0'):
4550 km- cm (conversion) = 4550*100000 = 455000000 cm
So:
455000000 cm/2.5cm=182000000

In Closing: The Atlantic Ocean is 182000000 years-old.