A cone-shaped camping lamp with a bottom circumference of 62.8 cm and a height of 30 cm. How large is the lamp?
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The circumference of a circle of radius r= = pi * 2 * 62.8 / 3.14 / 2=10C=2 PI RThe area of s=3.14*10*10=314 square circle radius x = PiS= PI R2The volume of =1/3 circular cone * * high V=314*30 / 3=3140 bottom areaLetter formula: V=1/3SH
The Zhou Changzhi radius is 10, the volume is 1/3*, and the bottom area is * high
