Among the following length which one is the smallest
A 0.003km
B 200mm
C. 4m
D 50cm

B 200mm.

Step-by-step explanation:

B 200mm = 200 x 1/1000m = 2/10m = 0.2m

the answer to your question a or b but i am pretty sure it is b. i hope this : )

step-by-step explanation:

ruth is 6 years old

step-by-step explanation:

6 + 24 = 30,   so 6/30 = .2  

if you do 1/5 it also equals .2, so that is the answer.