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If 3√5 + √125 = 17.88, then what is the value of √80 + 6√5 ?

A. 22.35
B. 13.41
C. 20.46
D. 21.66
See Answer & Explanation Lets Discuss
Correct answer is : A
Explanation

 3√5 + √125 = 17.88

=> 3√5 + √25 x 5 = 17.88

=> 3√5 + 5√5 = 17.88

=> 8√5 = 17.88

=> 5 = 2.235

=> √80 + 6√5 = √16 x 5 + 6√5

=> 4√5 + 6√5

=> 10√5 = (10 x 2.235) = 22.35

 

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