A tin of oil was 4/5 full. When 6 bottles of oil were taken out and four bottles of oil were poured into it, it was 3/4 full. how many bottles of oil can the tin contain? Choose the correct choice from the following answers:
A) 10	B) 40	C) 46	D) 36	E) 25
Suppose X bottles can fill the tin completely   Then Present oil = 4/5 X   after 6 bottles taken out it is 4/5 X - 6   after four bottles poured in it is 4/5 X - 6 + 4   now the oil level is 3/4X   so 4/5 X - 6+4 = 3/4X ===&gt; 4/5 X - 3/4 X = 6-4   X/20=2   X=40   Therefore required no of bottles = 40   so 40 bottles of oil can fill the tin.   the answer is option 40) 40.
<result>B</result>
A tin of oil was 4/5 full. When 6 bottles of oil were taken out and four bottles of oil were poured into it, it was 3/4 full. how many bottles of oil can the tin contain?