15. That is if you had an area that was 15 meters long and one meter wide that would be 15 square meters. Now it you had an area that was 5 meters long and 3 meters long you would also have 15 square meters. So there is no one certain answer to your question as you asked it. You would need to change the question.
420 square meters
15 acres = 60,702.85 square meters
15 (square meters) = 161.458656 square feet.
225 square feet = ~21 (20.903184) square meters.
61.316 square meters
There are: 10*15 = 150 square meters
165 square meters.
5*3 = 15 square metres.
420 square meters
15 square meters is 161.46 square feet.
15 acres = 60,702.85 square meters
15m x 15m = 225 square meters.
About 23.7 square meters. (23.6902752 square meters).
About 23.7 square meters. (23.6902752).
161.459 square feet.
61.316 square meters
18.11 square meters.