Question

ajutati-ma va rog dau coroana va rog​

Answer 1

Explicație pas cu pas:

a)

$A_{l} = AA_{1} \cdot AD = 12 \cdot 10 = 120 \ dm^{2}$

b)

$L = AA_{1} \iff 2\pi r = 12 \implies r = \dfrac{6}{\pi}$

$A_{b} = \pi r^{2} = \pi \Big(\dfrac{6}{\pi}\Big)^{2} = \pi \cdot \dfrac{36}{\pi^{2}} = \dfrac{36}{\pi}$

$V = AD \cdot A_{b} = 10 \cdot \dfrac{36}{\pi} = \dfrac{360}{\pi} dm^{3}$