MathematicsVariationJAMB
P varies jointly as Q and R. If P = 24 when Q = 2 and R = 3, find P when Q = 5 and R = 4.
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Answer: C. 80
P = kQR: 24 = 6k, so k = 4; P = 4 × 5 × 4 = 80.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.