The scale factor of a map is 3 to 5. The actual dimension of a tree is 25. What is the scale model dimension of the tree?

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.