Calculate the volume of the present-day mid-ocean ridge using the geometry outli

Question

Calculate the volume of the present-day mid-ocean ridge using the geometry outlined in the figure below. It is estimated that the volume of the Cretaceous mid-ocean ridge is 40% larger than today. How much is the Cretaceous sea level higher than today due to the larger volume of Cretaceous mid-ocean ridge? Now let's consider the last glacial. If the volume of continental ice sheet during the last glacial maximum (LGM. ~20 thousand years ago) is 40 times 10^6 km^3 larger than today, how much is the LGM sea level lower than today because of the growth of the continental ice sheets (still use the cuboid shape model for oceans, ignoring surface area change in the ocean)?

Explanation / Answer

Solution of question (4).

Here present figure is a triangular prism and its volume is given by the formula that

Volume = area of triangular base x height of prism.

Here it is given that base of triangle is 2400 and its height of base is 50 km (it may be different also as in picture it is not clearly seen but if it is not 50, write that correct value in below calculation) and height of the prism is 60000

So its volume = (1/2 x base x height) x height OF prism

=1/2 x 50 x 2400 x 60000 = 25 x 2400 x 60000 = 3600000000 cubic km.

That is last required answer.

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