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The square root of 6400 is:

A800
B80
C60
D640
Answer & Solution
Correct answer: B. 80
1. 6400 is 64 times 100. 2. Root of 64 is 8 and root of 100 is 10. 3. So the root is 80. _Source: syllabus Mathematics, Chapter 6, Squares and Square Roots._
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