Question

Aria totala a unui cilindru drept cu raza de 5 cm si generatoarea de 3 cm este ...cm la a doua

Answer 1

At = Al + 2Ab
Al= $2 \pi RG = 2*3*5\pi = 30 \pi$
Ab = $\pi R^{2} = 25 \pi$
At = $30 \pi +2*25 \pi = 30 \pi +50 \pi =80 \pi$

Answer 2

At = Al + 2Ab

At = 2πrg + 2πr²

At = 2π·5·3 + 2π·25

At = 30π + 50π

At = 80π

At ≈ 251,2 cm²