Consider the following question and decide which of the statements is sufficient to answer the question.
Question:Â
Find the value of $$z$$,
Statements:
1) $$z^2 = 36 + a $$
2) $$a = x^2$$ & $$x = 8 $$
If we goes to the statement we observe that we have 3 equation and 3 unknown, so we need both the statement to find the value of 'z'.
or, from statement 2, $$a=8^2=64$$ . we put value of a in equation which is in 1st statement $$z^2=36+a$$ and value of a is 64
hence option 'B' is correct.
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