Answer:
30 shirts
Explanation:
What we know:
30 seconds = 3 shirts
1 minute 30 seconds = 9 shirts
30 seconds per each 3 shirts
shirts: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30
minutes: .5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5
3.5m questions
4.4m answers