How far beneath the top cannon do the projectiles collide?
Answer Choices
A. 31 \mathrm{~m}
B. 67 \mathrm{~m}
C. 110 \mathrm{~m}
D. 140 \mathrm{~m}
E. 170 \mathrm{~m}
How far beneath the top cannon do the projectiles collide?
Answer Choices
A. 31 \mathrm{~m}
B. 67 \mathrm{~m}
C. 110 \mathrm{~m}
D. 140 \mathrm{~m}
E. 170 \mathrm{~m}