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Q.

If $3 \sqrt{a + 4}$ and $5 \sqrt{10}$ are similar surds, then $a =$

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a

7

b

6

c

3

d

5

answer is C.

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Detailed Solution

3 \sqrt{a + 4}

and

5 \sqrt{10}

are similar surds then

$a + 4 = 10$

$a = 6$

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If 3a+4 and 510 are similar surds, then a=