 <translate> Total work done by both machines in a minute = 30 + 20 = 50 copies
Total number of copies required = 2000
Time = 2000/50 = 40 mins So the answer is (B). <yor> Apapọ iṣẹ ti awọn ẹrọ mejeeji ṣe ni iṣẹju kan = 30 + 20 = awọn ẹda 50 Àpapọ̀ iye ẹ̀dà tí a nílò = 2000 Àkókò = 2000/50 = 40 ìṣẹ́jú Nítorí náà ìdáhùn ni (B). 