Question

this question is hard but be make​

Answer 1

If u Remove 15L then 7/12 is left

Let X =total volume of drum

If we remove 15 L then remaining is (3x/4)-15

(7x/12)=(3x/4)-15

(7x/12)-(3x/4)=-15

(3x/4)-(7x/12)=15

(9x-7x)/12=15

X/6=15

X=90L