If the product is lined up with a 100mm side along the conveyer and there are no gaps between each product then we're asking to convert 20 m / minute to ? mm / minute.
(20 m / minute) * (1000 mm / 1 m)
20000 mm / minute
1 product = 100 mm
(20000 mm / minute) * (1 product / 100 mm)
200 products / minute
.
If the 50mm side of the product is lined up along the conveyor, then:
1 product = 50 mm
(20000 mm / minute) * (1 product / 50 mm)
400 products / minute