What is the surface area of the right cone below? 15
6
O A. 1267 units
O B. 540 77 units
O C. 1807 units2
D. 1307 units2

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.