2019 · Q27
If a : b = c : d = 1 : 6, then what is the value of (a² + c²)/(b² + d²)?
Elementary MathematicsRatio and Proportion
- A1/600
- B1/60
- C1/36
- D1/6
Explanation
a/b = c/d = 1/6 gives a = b/6 and c = d/6. Then (a^2+c^2)/(b^2+d^2) = (b^2/36 + d^2/36)/(b^2+d^2) = 1/36.