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      Question

      If (64)2 тАУ (36)2 = 20Z, the

      value of z is┬а
      A 70 Correct Answer Incorrect Answer
      B 120 Correct Answer Incorrect Answer
      C 180 Correct Answer Incorrect Answer
      D None of these Correct Answer Incorrect Answer

      Solution

      ATQ тЗТ ┬а(64)2┬а- (36)2┬а= 20Z тЗТ 4096 - 1296 = 20Z тЗТ 20Z┬а= 2800 тЗТ Z = 140

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