F varies jointly as Q and R and inversely with the square of D. If F=80 when Q=4, R=16 and D=0.4, determine F when Q=12, R=20 and D=0.2.
Added by Gabriel P.
Step 1
The problem states that F varies jointly as Q and R and inversely with the square of D. This can be written as: F = kQR/D^2 where k is the constant of variation. We can find the value of k using the given values of F, Q, R, and D: Show more…
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