2023 · Q64
The cube root of x varies inversely as the square root of y. x = 8 when y = 3. What is the value of x when y = 3√3?
Elementary MathematicsRatio and Proportion
- A18
- B21
- C24
- D27
Explanation
cubert(x).sqrt(y)=k; x=8,y=3 gives k=2sqrt3. At y=3sqrt3, x=8x3^(-3/4) approx 3.51, matching no option. Keyed option (c). Key disputed: verify against the official UPSC key.