A) 3 hours 30 minutes
B) 4 hours 15 minutes
C) 4 hours 40 minutes
D) 4 hours 25 minutes
E) None of these
Correct Answer: C
Solution :
DN Speed \[=\frac{10.8}{27}\times 60=24km/hr\] UP Speed \[=\frac{9.6}{32}\times 60=18km/hr\] \[\therefore \] Reqd time \[=\frac{48}{24}+\frac{48}{18}\] \[=2+2\frac{2}{3}=4\frac{2}{3}hr\] = 4 hr 40 minYou need to login to perform this action.
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