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WAEC Mathematics 2024 Objective — Question 15

Question 15 of 50 from the West African Examinations Council (WAEC) Mathematics 2024 Objective paper, with the correct answer and a full explanation.

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15. Make R the subject of the relation V = πl(R² - r²).

  • A. R = √(V/πl + r²)Correct
  • B. R = √(V/πl - r²)
  • C. R = √(V - πlr²)
  • D. R = √(V + πlr²)

Explanation

R² = V/πl + r² ⇒ R = √(V/πl + r²).

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