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?
- Rectangle (rectangular)
- square
- round
- 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
For rectangular (rectangular) ships, the larger the aspect ratio, the more consumables
So the answer is 3
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