Answer: it will take 30 hours to wrap 18 gifts
Explanation:
I cant really explain it so i will show you.
() = h (hours)
| = g (gifts)
( | | | | | | ) }-6
( | | | | | | ) }-6
( | | | | | | ) }-6
10h + 10h + 10h = 30h
6g + 6g + 6g = 18g
I hope this helped