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1.Água está saindo de um tanque em forma de um cone invertido a uma taxa de 10.000 cm 3 /min no momento em que água está sendo bombeada para dentro a uma taxa constante. O tanque tem 6 m de altura e seu diâmetro no topo é 8 m. Se o nível da água está subindo a uma taxa de 20cm/min quando a altura era 2 m, encontre a taxa com que a água está sendo bombeada para dentro. 2. Um balão de borracha de forma esférica é enchido de ar, de modo que seu raio aumenta à razão de 0,2cm/s. Calcule a taxa de variação do volume desse balão em relação ao tempo, no instante em que o raio for igual a 10cm
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