circuito paralelo

rt = r1.r2/r1+r2  10.20/10+20 =6.6omhs
it = vt / rt 9v/6.6omhs = 1.36
ir1 = v/r1 9/10 = 0.9 amp
ir2 = v/r2 9/20 9/20 = 0.45 amp