U is inversely proportional to the cube of V and U = 81 w...
U is inversely proportional to the cube of V and U = 81 when V = 2. Find U when V = 3
24
27
32
36
Correct answer is A
U ∝1V3
U = kV3
k = UV3
k = 81 x 23 = 81 x 8
When V = 3,
U = kV3
U = 81×833
U = 81×827 = 24
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