Answer:
Owen has cycled 30 km in total.
Explanation:
Number of km already traveled = 7
he plan to cycle 1 km during each trip to work.
Number of trips to work =23
Hence,
Number of km traveled during trip to work = 1 km
Number of trips to work =

Now Total km Owen had cycled is equal sum of Number of km already traveled and Number of km traveled during trip to work.
Total km Owen had cycled =

Hence Owen had cycled total of 30 km.