Spherical cap

What is the surface area of a spherical cap, the base diameter 20 m, height 2 m.

Correct result:

S =  326.73 m2


h=2 m D=20 m=>ρ=D/2=10 m  r2=(rh)2+ρ2 2rh=h2+ρ2 r=h2+ρ22h=22+10222=26 m S=2πrh=2π262=326.73 m2

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