[] 利用圆柱体的体积公式计算了,圆桶的底面积*水的高度 就是圆的面积公式 派*R的平方 R是圆桶地面的半径,派就是那个3.1415926的数字We use the formula for the volume of the cylinder to calculate the height of the water on the bottom of the barrel which is the area of the circle and the square of the formula is the radius of the barrel and Pi is the number of that
圆桶装水就是算体积 圆柱体积为 V=底面积*高 也就是水的体积 再乘以水的密度 就是的质量The volume of water in a cylinder is the volume of the cylinder and the height of the area is the volume of the water times the density of the water is the mass
[] 先计算出圆桶体积:底面积*高;在用这个体积*水的密度(1/立方米)就好了
量圆铁桶的内部圆的直径和铁桶内部的高,就行了.容量等于圆周率乘以半径的平方,再乘以铁桶高度,就是了.注意测量的长度,单位要统一.
[] 水的密度是1.0*103 kg/m3.计算桶里面水的体积,然后乘以密度,就是质量了
[] 3.14*(40÷2)2*50 =3.14*400*50 =62800(立方厘米) =62.8(升)答:这个水桶大约装纯净水62.8升.
你好!3.14*2.5*2.5/4*2.6=12.75方 打字不易,采纳哦!
[] 直径35厘米的圆面积为:(35²÷4)*3.14=961.625cm².圆桶体积为:961.625*35=33656.875cm³.可以装水约33.7公斤.The diameter of the circle area for the drum volume can hold about kg of water