 
 <translate> Work done by P in 1 day = 1/20
Work done by Q in 1 day = 1/12
Work done by P in 4 days = 4 × (1/20) = 1/5
Remaining work = 1 – 1/5 = 4/5
Work done by P and Q in 1 day = 1/20 + 1/12 = 8/60 = 2/15
Number of days P and Q take to complete the remaining work = (4/5) / (2/15) = 6
Total days = 4 + 6 = 10 So the answer is (E). <ibo> Ọrụ P rụrụ n'otu ụbọchị = 1/20 Ọrụ Q rụrụ n'otu ụbọchị = 1/12 Ọrụ P rụrụ n'ụbọchị anọ = 4 × (1/20) = 1/5 Ọrụ fọdụrụ = 1 <unk> 1/5 = 4/5 Ọrụ P na Q rụrụ n'otu ụbọchị = 1/20 + 1/12 = 8/60 = 2/15 Ọnụ ọgụgụ ụbọchị P na Q na-ewe iji rụchaa ọrụ fọdụrụ = (4/5) / (2/15) = 6 Nchịkọta ụbọchị = 4 + 6 = 10 Ya mere azịza ya bụ (E). 