Answer:
1/3
Step-by-step explanation:
You can try it I keep getting 3 so maybe that’s the answer
Answer: 
Step-by-step explanation:
Given
The dimension of the box is

Space occupied by the box is equal to its volume i.e.

The volume of the box is
.
18 - [ 18 - [ 18 - ( 18 - 1)]]
= 18 - [ 18 - [ 18 - 17]]
=18 - [ 18 - 1]
= 18 -17
=1
3r=10+5s
3*10=10+5s
30=10+5s
30-10=5s
20=5s
s=4
r=10
1-2/3=1/3
1/3^2=1/9
1/9•1/4=1/36
1/36+1/3=13/36
13/36 is your answer