MathematicsVariationJAMB
The cost of a metal ball varies as the cube of its radius. A ball of radius 2 cm costs ₦400. Find the cost of one of radius 3 cm.
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Answer: A. ₦1,350
k = 400/8 = 50; cost = 50 × 27 = ₦1,350.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.