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Question
$$\sqrt {176 + \sqrt {2401} } $$    is equal to = ?
Options:
A .  14
B .  15
C .  18
D .  24
Answer: Option B
$$\eqalign{
& {\text{Given expression,}} \cr
& = \sqrt {176 + 49} \cr
& = \sqrt {225} \cr
& = 15 \cr} $$

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