I have a huge bed-sheet of 1 meter long.
I want to cuts this role into pieces of 20 centimeter long cloth.
How long will it take me to cut the bed sheet if each 20 centimeter cut took me 5 minutes ?  Answers.
A) 150 min
B) 245 min
C) 185 min
D) 300 min
E) 205 min

Rationale: b it will take 49 cuts not 50 . so 49 * 5 = > 245 minutes
Answer: B