![](https://cdn.steemitimages.com/DQmU5V2rLCUUGgWYcG1KTe2JJTtmbvHp6JcJnap9PrPvbTC/image.png) Mathematical problems / volume / ship shape The grandson who was in elementary school yesterday asked me, When using wood to build a ship, What type of boat is the most buoyant and the most material-saving? 1) Rectangle (rectangular) 2) square 3) round 4) 3 angles I was thinking, Aren't the ships all rectangular? I listed the formula Take the rectangle as an example: Surface area = wood usage = 2 * (length * width) + (length + width) * 2 * height Buoyancy to which the ship is subjected = volume of discharged water = length * width * height Can be seen from the calculation table round boat is most cost-effective ![](https://cdn.steemitimages.com/DQmamf2z1jdVdwmXPKkMhFLJRzx2xe2UzmtM3K4CFAmT81i/image.png) For rectangular (rectangular) ships, the larger the aspect ratio, the more consumables So the answer is 3 ![](https://cdn.steemitimages.com/DQmbYAPyFBEsFPvr688RQzxHVnCwfWZpc7mL83Zgk5YoEQQ/image.png) 数学问题/材积/船的形状 昨天读小学的孙子问我, 使用木头来造船的时候, 哪种形状的船,浮力最大又最省材料? 1)长方形(矩形) 2)正方形 3)圆形 4)3角形 当时我想着, 船不就都是长方形的吗? 我把公式列了出来 以长方形(矩形)為例 : 表面积=木材使用量= 2 *(长*宽)+(长+宽)* 2 *高 船所受到的浮力=排开水的体积=长*宽*高 从计算表中可看出, 圆形船算划算, 再来是方形船较为划算. 长方形(矩形)的船, 當其长宽比越大,耗材越多 所以答案是3
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