Cups A and B are cone shaped and have heights of #38 cm# and #25 cm# and openings with radii of #8 cm# and #13 cm#, respectively. If cup B is full and its contents are poured into cup A, will cup A overflow? If not how high will cup A be filled?

Question

1380 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-02-22T17:50:32

Cup A will overflow. The exceeding volume is #(1793pi)/3 ~=1,877.63cm^3#

Finding the maximum volume of A and B

#V_A=(S_(base A)*height_A)/3=(pi*r_A^2*h_A)/3=(pi*8^2*38)/3=(2432pi)/3#

#V_B=(S_(base B)*height_B)/3=(pi*r_B^2*h_B)/3=(pi*13^2*25)=(4225pi)/3#

Since #V_A < V_B#, cup A will overflow and

#Delta V=V_B-V_A=(4225pi)/3-(2432pi)/3=(1793pi)/3~=1,877.63cm^3#