Answer:
3 13/20 mm.
Step-by-step explanation:
3/4 + 1 2/5 + 1 1/2
= 3/4 + 7/5 + 3/2
The LCD of 2, 4 and 5 = 20 so we can write the above as
15/20 + 28/20 + 30/20
= 73/20
= 3 13/20 mm (answer).
