help pls I need help

Question

3 roads, A, B, and C. B is 3 times longer than A. C is three as long as B. Draw the roads. What fraction of the total length of the roads is the length of A? 

If Road B is 10 miles longer than Road A, what is the length of Road C?

Answer 1

So the total length is:

So A is 1/27 the total length.

If A + 10 = B and 3A = B then 3A = A + 10

3A = A + 10

2A = 10

A = 5

B = 15

C = 45

Answer 2

B=3A

C=3B = 3(3A) = 9A

A+B+C = A + 3A + 9A = 13A

A = (1/13) of the total of all 3 roads

B=10+A = 3A

2A =10

A = 5

C =9A = 45