Question

4:20::8:? Option A=73,B=72,C=75,D=78
How the answer will come 72

Answer 1

Answer:

40 is the correct answer.

Explanation:

Let the number be x.

$we \: know \: that \\ \: \frac{a}{b} = \frac{c}{d} \\ = > \frac{4}{20} = \frac{8}{x} \\ = > 4x = 20 \times 8 \\ x = \frac{20 \times 8}{4} = 40$