Answer:
49.6% of container A is still full
Step-by-step explanation:
volume of a cylinder : pi×r²×h
Va = pi × 12² × 15 = pi×144×15 = 6785.84013... ft³
Vb = pi × 8² × 17 = pi×64×17 = 3418.05281... ft³
how much of A is still filled, when B has been completely filled ?
Va left = Va - Vb = 3367.78732... ft³
100% of Va = 6785.84013... ft³
1% of Va = 67.8584013... ft³
so, how often does 1% of Va fit into the remaining filing volume of A (Va left) ?
3367.78732... / 67.8584013... = 49.6(2962963...)%