Respostas

2014-06-15T22:46:20-03:00




Logo a roda percorre 25,12.10⁻⁴ km em 1 volta. Regra de 3:

25,12.10⁻⁴ km ----------- 1 volta
16,328 km ---------------- x


1 5 1
X=6500 VOLTAS. RESPOSTA COM CERTEZA CERTA. ESPERO TER AJUDADO.
d=80cm\\2r=80cm \\ r=80cm/2 \\ r=40cm \\ r=40*10^{-2}m \\ r=40*10^{-2}*10^{-3}km \\ r=4*10^{-4}km

C=2*\pi*r \\ C=2*3,14*4*10^{-4} \\ C=25,12*10^{-4}km

Logo a roda percorre 25,12.10⁻⁴ km em 1 volta. Regra de 3:

25,12.10⁻⁴ km ----------- 1 volta
16,328 km ---------------- x

25,12*10^{-4}*x=16,328*1 \\ x=16,328/(25,12*10^{-4}) \\ x=0,65/10^{-4} \\ x=0,65*10^{4} \\ x=0,65*10000 \\ x=6500\:voltas