Do you know how to do these 2 math problems?!?!!?i need heeeeelllllp!!!!!!

4 cm, Find the surface area and volume of a right cone with a radius of
slant height of 5 cm, and a height of 3 cm.





Find the surface area and volume of a sphere with a radius of 20 yards.

SA = pi r L = pi (4)(5) = 20 pi cm^2

V = (1/3) pi r^2 h = (1/3) pi (4 cm)^2 (3 cm) = 16 pi cm^3

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SA = 4 pi r^2 = 4 pi (20 yd)^2 = 1600 pi yd^2

V = (4/3) pi r^3 = (4/3) pi (20 yd)^2 = 8000/3 pi cm^3