NECO Mathematics 2024 Objective — Question 15
Question 15 of 50 from the National Examinations Council (NECO) Mathematics 2024 Objective paper, with the correct answer and a full explanation.
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Make R the subject of the relation V=πl(R²−r²)
- A. A. R=√(V/πl)+r²
- B. B. R=√(V/πl−r²)Correct
- C. C. R=√(V−πlr²)
- D. D. R=√(V+πlr²)
Explanation
V=πl(R²−r²). Divide both sides by πl: V/πl=R²−r². Then R²=V/πl+r². Then R=√(V/πl+r²).
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