A) 12 km
B) 8 km
C) 6 km
D) 5 km
Correct Answer: A
Solution :
\[\text{Time=}\frac{\text{Distance}}{\text{Speed}}\] Let distance travel by person from A to B be x km \[\therefore \] \[7=\frac{x}{4}+\frac{x}{3}=\frac{x(3+4)}{12}=\frac{7x}{12}\] \[\Rightarrow \] \[x=12\,\text{km}\]You need to login to perform this action.
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