If it takes 5 sewing machines 5 minutes to mak 5 shirts
How long does it take 100 sewing machines to make 100 shirts?
If the sewing machines are independent of each other, then the number of shirts is proportional to number of sewing machines x time. So,
5 : 5 x 5, or:
5 shirts/[5 machines x 5 minutes] = 1 shirt per 1 machine in 5 minutes.
5 /[5 x 5] = 100/[100 x M], and
M = 5 minutes - so takes 5 minutes for 100 sewing machines to make 100 shirts.
If the sewing machines are independent of each other, then the number of shirts is proportional to number of sewing machines x time. So,
5 : 5 x 5, or:
5 shirts/[5 machines x 5 minutes] = 1 shirt per 1 machine in 5 minutes.
5 /[5 x 5] = 100/[100 x M], and
M = 5 minutes - so takes 5 minutes for 100 sewing machines to make 100 shirts.