math
posted by vincent on .
The number of washers 3/32 inch thick that can be cut from a piece of stock 25 1/2 inches long, allowing 1/16 inch for waste for each cut is
(A) 160
(B) 163
(C) 260
(D) 272
(E) 408
not just answer, please tell me how to do it

each washer uses 3/32 + 1/16 = 5/32" of stock, including waste
(51/2) / (5/32) = 51/2 * 32/5 = 163.2
So, (B)