Answer:
Step-by-step explanation:
Total resistance = R₁ + R₂ + R₃
= 6 + 8 + 10
= 24 OHM 
Total emf = 12 V 
current I = 12 / 24 = .5 A .
Voltage across R₁ = current x resistance 
= .5 x 6 = 3 V 
Voltage across R₂ = current x resistance 
= .5 x 8 = 4 V 
Voltage across R₃ = current x resistance 
= .5 x 10 = 5 V 
Total volts = 3 + 4 + 5 
= 12 V .