A's weight is 25% of that of B and 40% of that of C. What percentage of C's weight is B's weight?

160%

A = 25% of B  = \(\frac{ 1 }{ 4 }\)B

A : B = 1 : 4

A =  40% of C = \(\frac{ 2 }{ 5}\)C

A : C = 2 : 5

Now, A : B : C = 2 : 8 : 5

Percentage of C's weight is B's weight = \(\frac{ 8}{ 5 }\) × 100%

= 160%

The correct answer is Option (3) → 160%