Anushka walks to her office 5 km away from home. In the morning she covers the distance in 1 hour, whereas while returning home in the evening, she takes 15 more minutes to cover the same distance. Find her average speed (in km/hr) during the two-way journey.
\( \frac{38}{9} \)
\( \frac{40}{9} \)
\( \frac{40}{11} \)
\( \frac{41}{9} \)