Verified answer

Answer:

60 cans of 1 litre can be filled in 200 litre drum

[tex]Amount \: of \: oil \: in \: drum \\ \\ = 200 \: litre[/tex]

[tex]Total \: amount \: of \: oil \: filled \\ in \: 10 \: cans \: of \: 5 \: litre \\ \\ = 10 \times 5 \\ \\ = 50 \: litre[/tex]

[tex]Total \: amount \: of \: oil \: filled \\ in \: 20 \: cans \: of \: 3 \: litre \\ \\ = 20 \times 3 \\ \\ = 60 \: litre[/tex]

[tex]Total \: amount \: of \: oil \: filled \\ in \: 15 \: cans \: of \: 2 \: litre \\ \\ = 15 \times 2 \\ \\ = 30 \: litre[/tex]

[tex] Therefore, \: total \: amount \: of \: \\ oil \: filled \\ \\ = 50 \: litre + 60 \: litre + 30 \: litre \\ \\ = 140 \: litre [/tex]

[tex]Remaining \: oil \: \\ \\ = 200 \: litre - 140 \: litre \\ \\ = 60 \: litre[/tex]

[tex]Remaining \: oil \: can \: be \: \\ filled \: in \: cans \: of \: 1 \: litre[/tex]

[tex]Therefore \: , number \: of \: cans \\ filled \: in \: 60 \: litre \\ oil = 60[/tex]