2026年8月国际B卷 · 第 18 题

2026年8月国际B卷 · 原库模块 2 · Q18 参考答案

The table shows the volume of two similar solids, right circular cylinder A and right circular cylinder B. The radius of right circular cylinder A is 7 units. The surface area of right circular cylinder A is kπ square units, and the surface area of right circular cylinder B is nπ square units, where k and n are constants. What is the value of \( n−k \)? (The surface area of a right circular cylinder with radius r and height h is \( 2πr^{2}+2πrh \).)