Question

Un cilindru aria toala =72 π si aria lat =40π aria. Bazaei egala cu .....

Answer 1

$A_t_o_t_a_l_a=A_l+A_b\longrightarrow A_b=A_t-A_l\longrightarrow Ab=72\pi-40\pi=32\pi$

Answer 2

Al=Al+2Ab=> 40π+2Ab=72 π=>2Ab=72-40....2Ab=32 |÷2=>Ab =16 π cm²