Answer: The Equator passes through 3 oceans. They are, Atlantic Ocean,
The Indian Ocean,
and the Pacific Ocean.
Explanation: The Equator is an imaginary great circle around the Earth, equidistant from the two poles, and dividing earth's surface into the northern and southern hemisphere.
Ps: Image gotten from Wikipedia and edited by Me.
The circle with diameter of 24 means that 2

r = 24.
Solving for r, we get

r=24.
Dividing both sides by

, we get r=24/

.
The area of the full circle is

times 24 squared over

. The

being multiplied cancels out, meaning that 24 squared over

is the area of the full circle. 24 squared is 576, and dividing by 16 we get

as the answer.
It's a type of fossil specifically called a 'Cast.'