Решение
![`and`(V[H] = `*`(`+`(`*`(4, `*`(Pi, `*`(`^`(r, 3))))), `/`(1, 3)), `*`(`+`(`*`(4, `*`(Pi, `*`(`^`(r, 3))))), `/`(1, 3)) = 12)](images/e_45.gif){kind=small}
![`and`(V[F] = `*`(`+`(`*`(2, `*`(Pi, `*`(`^`(r, 2))))), r), `and`(`*`(`+`(`*`(2, `*`(Pi, `*`(`^`(r, 2))))), r) = `+`(`*`(2, `*`(Pi, `*`(`^`(r, 3))))), `+`(`*`(2, `*`(Pi, `*`(`^`(r, 3))))) = 12))](images/e_46.gif){kind=small}
![`and`(V[H] = `*`(`+`(`*`(4, `*`(Pi, `*`(`^`(r, 3))))), `/`(1, 3)), `and`(`*`(`+`(`*`(4, `*`(Pi, `*`(`^`(r, 3))))), `/`(1, 3)) = `+`(`*`(`/`(2, 3), `*`(V[F]))), `+`(`*`(`/`(2, 3), `*`(V[F]))) = 8))](images/e_47.gif){kind=small}