Volume of 3 spheres with diameter 3 in = 3( 4/3 π(1.5)³) = 13.5π in³
Volume of sphere with diameter 8 in = 4/3π(4)³ = 85.3π in³
Volume of hemisphere with diameter 9 in = 1/2 (4/3π(4.5)³) = 60.75π in³
Answer : Volume of sphere with diameter 8 in is the greatest. (Answer B)