Question

What is the length of AB + CD?
(I) $AD=30$
(II) $BC=10$

• A. Statement (I) ALONE is sufficient, but statement (II) alone is not sufficient
• B. Statement (II) ALONE is sufficient, but statement (I) alone is not sufficient
• C. BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient
• D. EACH statement ALONE is sufficient

Answer 1

Answer: (C)

BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient

Here, AD=AB+BC+CDAD=AB+BC+CD
AB+CD=AD−BCAB+CD=AD−BC
Hence, both the statements together are necessary to answer the question.