A

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Q. If (64)² - (36)²= 20 * x, then what is the value of x?

  • (A) 120
  • (B) 140
  • (C) 112
  • (D) None of the above
  • Correct Answer - Option(B)
  • Views: 34
  • Filed under category Math
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Explanation by: Admin

Here, we can apply the formula of
a^2 - b^2 = (a + b) (a - b)

So, after applying the formula, we will get

(64 + 36) (64 - 36) = 20 * x

100 * 28 = 20 * x

x = 100 * 28/ 20 = 140

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