PPSC Assistant (BS-16) Labour And Human Resource – 2020, Maths MCQs, PPSC Solved Past Papers MCQsX and Y can do a piece of work in 20 days and 12 days respectively. X started the work alone and then after 4 days Y joined him till the completion of the work. How long did the work last?A. 6 days B. 10 days C. 15 days D. 20 days When a person is killed by his brother is called as?Who was appointed the first principal of Darul alum Deoband ?
