Question

Question #81aa8

Answer 1

15 km < distance < 20 km

Explanation:

Given that Gill walked for `5` hours and her average speed was somewhere between 3 and 4 kilometers/hour, we find the upper and lower boundaries:

Upper: 4 km/h; after 5 hours Gill would walk 20 kilometers.
Lower: 3 km/h; after 5 hours Gill would walk 15 kilometers.

But her average speed was between the two boundaries. Thus she walked greater than 15 km but less than 20, so:
15 km < distance < 20 km.