Gasoline tank cylindrical

What is the inner diameter of the tank, which is 8 m long and contains 40 cubic cubic meters of gasoline?

Correct result:

D =  2.523 m

Solution:

V=40 m3 l=8 m S=V/l=40/8=5 m2 S=πD2/4 D=4⋅ S/π=4⋅ 5/3.1416=2.523 mV=40 \ \text{m}^3 \ \\ l=8 \ \text{m} \ \\ S=V/l=40/8=5 \ \text{m}^2 \ \\ S=\pi D^2/4 \ \\ D=\sqrt{ 4 \cdot \ S/ \pi }=\sqrt{ 4 \cdot \ 5/ 3.1416 }=2.523 \ \text{m}

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