Assuming that the seafloor is spreading at a rate of 1.3cm/yr, calculate how long it took africa's west coast to move 2400 kn away from the mid atlantic ridge

184,615,384.6 years

Explanation:

This problem can be solve by the following equation:

(1)

Where:

is the spreading rate of the seafloor, its velocity

is the distance the Africa's west coast moved at this rate

is the time it took to the coast to move the descibed distance

Isolating from (1):

(2)

(3)

Finally:

This is the time it took to the Africa's west coastto  move away from the Mid atlantic ridge.