Three variables p, q and r are such that p varies directly as q and inversely as the square of r. (a) When p = 18,...

      

Three variables p, q and r are such that p varies directly as q and inversely as the square of r.
(a) When p = 18, q = 24 and r = 4.Find p when q = 30 and r = 10.
(b) Express q in terms of p and r.
(c) If p is increased by 20% and r is decreased by 10% find:
(i) A simplified expression for the change in q in terms of p and r.
(ii) The percentage change in q.

  

Answers


sharon
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sharon kalunda answered the question on August 27, 2019 at 11:55


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