题目

It' s 2035. You have a job, a family and you' re about 40 yews old I Welcome to your future life. Getting ready for work, you pause in front of the mirror. Turn red, you say. Your shirt changes from sky blue to deep red. Tiny preprogrammed electronics (智能电子元件) are rearranged in your shirt to change its color. Looking into the mirror, you find it hard to believe you' re 40. You look much younger. With amazing advances in medicine, people in your generation may live to be 150 years old. You' re not even middle-aged! As you go into the kitchen and prepare to pour your breakfast cereal一圆锥形冰淇淋纸桶的母线长是6cm，底面圆的直径是4cm，则此纸桶的侧面积是（     ）cm2. 纸桶的高为（     ）cm。