If x varies directly as square root of y and x = 81 when y

MATHEMATICS

JAMB 2011

If x varies directly as square root of y and x = 81 when y = 9, Find x when y = 1⁷/₉

A. 20¹/₄
B. 27
C. 2¹/₄
D. 36

Correct Answer: D. 36

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