 
<translate> Ọrụ A rụrụ n'ụbọchị atọ = 3/5 Ọrụ fọdụrụ = 2/5 Ọrụ A na B rụrụ n'otu ụbọchị = 1/5 + 1/10 = 3/10 Ọrụ fọdụrụ = 2/5 * 10/3 = 4/3 ụbọchị. Ya mere, azịza ikpeazụ bụ (A). <eng> Work done by A in 3 days = 3/5
Remaining work = 2/5
Work done by both A and B in one day = 1/5 + 1/10 = 3/10
Remaining work = 2/5 * 10/3 = 4/3 days. So the final answer is (A). 