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Ans 1:
Class : Class 6
Use common sense it can't be options b , c and d as (2a)^2 is 4a^2 and except in option a , the answer is not there. So it is A

full. When six bottles of oil were taken out and four bottles of oil were poured into it, it was
full. How many bottles of oil can the tin contain?
Expansion of (2a + 3b +
4c)2 is ____.