Post Utme Unn 2025 Mathematics Question 21

Practice objective / multiple choice question 21 from the 2025 Post Utme Unn Mathematics examination.

Post Utme Unn 2025 Mathematics Objective / Multiple Choice Medium Difficulty

Question 21 POST_UTME_UNN • 2025 • MATHEMATICS • objective

A solid is formed by rotating the region bounded by \( y=\sqrt{x} \), \( y=0 \) and \( x=4 \) about the x‑axis. Find its total surface area.

A. \( \frac{\pi}{4}\bigl(17\sqrt{17}-1\bigr) \)

Correct Answer B. \( \frac{\pi}{6}\bigl(17\sqrt{17}-1\bigr) \)

C. \( \frac{\pi}{3}\bigl(17\sqrt{17}-1\bigr) \)

D. \( \frac{\pi}{6}\bigl(16\sqrt{16}-1\bigr) \)

Correct Answer

Correct Option:

\( \frac{\pi}{6}\bigl(17\sqrt{17}-1\bigr) \)

This is Post Utme Unn 2025 Mathematics Question 21. It is one of the objective questions from the 2025 Post Utme Unn Mathematics examination.

Difficulty level: Medium .

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