correct answer is: b) 56 kg

Explanation

Here,
Two quantities is 5\;:\;7
And, antecedent is 40 kg.
Let, consequent be ‘x’ kg.
According to the question,
\rightarrow 5\;:\;7=40\;:\;x
\rightarrow\large\frac{5}{7}\normalsize=\large\frac{40}{x}
\rightarrow 5x=\left(40\times7\right)
\rightarrow x=\large\left(\frac{40\times7}{5}\right)
\rightarrow x=56
\therefore Consequent is 56 kg.
Ans: 56 kg.

An additional variation of this particular math query can be considered:

1. When the antecedent in a ratio of 5:7 is 40 kg, what is the value of the consequent?
2. If the antecedent in a ratio of 5:7 is 40 kg, what is the consequent?
3. If one quantity in a ratio of 5:7 is 40 kg, what is the weight of the other quantity?