Question

Dimensions of a paper cup. The volume of a paper cup, shaped like a circular cone is 30pie cubic centimeters. The radius of the top of the cup is 3 centimeters. What is the height of the cup?

Answer 1

v = (1/3)(π)(r^2)h
30pi cm^3=(1/3)(π)(3^2)h

find h.

Answer 2

v = (1/3)(ð)(r^2)h
3v = ð (r^2)h
3v/ð = (r^2)h
3v/ð(r^2)= h