MathematicsVariationWAEC
y varies jointly as x and the square of z, and y = 48 when x = 3 and z = 2. Find y when x = 2 and z = 3.
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Answer: D. 72
k = 48 ÷ 12 = 4, so y = 4 × 2 × 9 = 72.
An AdmitMe practice question, written for the WAEC syllabus. Not an official past question.