A Radio Station Broadcasts at a Frequency Of $80 \mathrm { MHz }$

Multiple Choice

A radio station broadcasts at a frequency of $80 \mathrm { MHz }$ . How far from the transmitter will this signal travel in $67 \mathrm {~ms}$ ? $\left( c = 3.0 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } \right)$

A) $80 \mathrm {~km}$
B) $20 \times 10 ^ { 6 } \mathrm {~m}$
C) $40 \mathrm {~km}$
D) $60 \times 10 ^ { 6 } \mathrm {~m}$
E) $67 \mathrm {~m}$