Area= 4*3.14*r2
7854 cm2 = 4 x 3.1416 x r2
7854 cm2 = 12,5664 x r2
7854 cm2 / 12,5664 = r2
625 cm2 = r2
sacamos de todo la √
√625 cm2 = √r2
25 cm = r
V = (4/3) π r3
V = (4/3) 3.1416 x (25 cm)al cubo
V = (4/3) 3.1416 x 15625 cm3
V = 196350 cm3 / 3
V = 65450 cm3 //
