In a parking lot of 240
240
red and blue cars, the ratio of red cars to blue cars is 3 : 5
3
:
5
.

How many red cars are in the parking lot?

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.