B if both are in same direction and C if in opposite.
B if both are in same direction and C if in opposite.
Choose either:
A: 510/r mph
B: 510 + r mph
C: 510-r mph
D: r-510 mph
B if both are in same direction and C if in opposite.
B if both are in same direction and C if in opposite.
B if both are in same direction and C if in opposite.
B if both are in same direction and C if in opposite.
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