B. Solve the word problem. 1. A closed cone model made of a tin has a radius of 4 cm and a slant height of 8 cm. Find the amount of material used in making the cone. 2. Find the surface area of a plastic ball of radius is 18cm.​

B Solve The Word Problem 1 A Closed Cone Model Made Of A Tin Has A Radius Of 4 Cm And A Slant Height Of 8 Cm Find The Amount Of Material Used In Making The Cone class=