Tyra is training for a bicycle race. each week she rides a total distance greater than 10 kilometers and less than or equal to 30 kilometers. if the distance is always an even number and a multiple of 3, what are the possible distances tyra rides in one week?

Amountain climber starts a climb at an elevation of 453 feet above sea level at his first rest stop he has climbed 162 feet and by his second rest stop he has climbed another 207 feet its getting late in the day so the climber starts his way down if the climber desends 285 feet how much does he need to ascend or descend to return to the original starting point