Question

The surface area of the earth's crust is 5.10*10^8km^2. The average thickness of the earth's crust is 35km. The mean density of the earth's crust is 2.8g/cm^3. The most abundant element in the earth's crust is oxygen with an abundance of 4.55*10^3g/t. Calculate the total volume of the earth's crust.

Answer 1

Answer:

The answer is $V = 1.785 \times 10^{10}\ Km^3$.

Explanation:

You are asking only for the total volume, so the important data here is the surface area of the earth's crust,

$A = 5.10 \times 10^8\ Km^2$

and the average thickness of the earth's crust,

$h = 35\ Km$.

Imagine that you can stretch the surface area as if it were a blanket, now if you want to calculate its volume, you just need to multiply its area by its thickness,

$V = A*h = 1.785 \times 10^{10}\ Km^3$.