请问:一个数学应用题!急求答案```````````````````一个圆柱体侧面积是314平方厘米,体积是628立方厘米,请问它的表面积是多少平方厘米呢?谢谢了````````拜托大家告诉我答案啊`````````````````````````````
2019-05-30
请问:一个数学应用题!急求答案```````````````````
一个圆柱体侧面积是314平方厘米,体积是628立方厘米,请问它的表面积是多少平方厘米呢?谢谢了````````
拜托大家告诉我答案啊`````````````````````````````
优质解答
侧面积是314平方厘米,即
2*3.14*r*h=314 (1)
体积是628立方厘米,即
3.14*r*r*h=628 (2)
(2)/(1)得
r/2=2
r=4
S表=S侧+2*S底
S表=314+2*3.14*4*4=414.48
侧面积是314平方厘米,即
2*3.14*r*h=314 (1)
体积是628立方厘米,即
3.14*r*r*h=628 (2)
(2)/(1)得
r/2=2
r=4
S表=S侧+2*S底
S表=314+2*3.14*4*4=414.48