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Let the walking time be t hrs then the jogging time is 1 - t hours.

Distance walked = 5t (Velocity x time)

Distance jogged = 9(1 - t)

Total distance travelled = 8 km

Therefore 8 = 5t + 9(1 - t) = 5t + 9 - 9t = -4t + 9.

So, 4t = 9 - 8 = 1 : t = 1/4

If the walking time is 1/4 hr then the jogging time is 1 - 1/4 = 3/4 hr.

Distance jogged = 9 x 3/4 = 6.75 km

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