It is known that the height of a cone is 6cm and the length of generatrix is 10cm. It is necessary to calculate the volume of the inscribed sphere and the surface area of the circumscribed sphere

It is known that the height of a cone is 6cm and the length of generatrix is 10cm. It is necessary to calculate the volume of the inscribed sphere and the surface area of the circumscribed sphere

Let H be the cone height, l be the generatrix length, a be the base radius, R be the inscribed sphere radius, R be the circumscribed sphere radius, then H & nbsp; = & nbsp; 6, & nbsp; L & nbsp; = & nbsp; 10A & nbsp; = & nbsp; sqrt (L ^ 2-h ^ 2) & nbsp; = & nbsp; 8 can be seen from the figure & nbsp; X ^ 2 + R ^ 2 & nbsp; = & nbsp; y ^ 2 and the value of X is & nbsp; X & nbsp