Let the person's arm length be = x
Condition is : sleeve lengths available from 20 inches to 40 inches and the length of the sleeves should be about 1.2 times a person's arm length.
So, the inequality equation becomes:
This gives x= or
or x==33.33 or
Hence, the shop does not provide tuxedos to people with arm length less than 16.66 inches and greater than 33.33 inches.