question 20

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FATIN RAZA KHAN asked 1 year ago

21L have to divide into 3 equal portion=7,7,7. with the help of 3 can 5,8 and 12L cans
start with 12L+remove 5L =7L (which is 2 transfer) for 1 container
repeat again for second 7L container (2 transfer) then remained is 7 L
so 2+2 transfer=4,so the answer is (2option)

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