Question

How to figure it out

Answer 1

A)10
b)5
c)15
d)30....I guess.....just use simple trick .....as the whole is 1/3 so as the sides

Answer 2

Im not 100% sure but 
A: 10
B: 5     
C: 15
D: 30 
for:
A: 30 x 1/3 
B: 15 x 1/3
C: 5/ 1/3
D: 10/ 1/3