it is given that when r remains unchanged , p varies directly as q.....when q remains unchanged, p varies directly as the cube of r. when q= 1/6 and r=3, and p=18
find an equation connecting p, q, r
find the value of r when p=54, q=4
f.4 maths variation
2012-04-26 7:14 am
回答 (1)
2012-04-26 7:53 am
✔ 最佳答案
Find an equation connecting p, q, r :Let p = k q r³18 = k (1/6) (3³)k = 4∴ p = 4 q r³
Find the value of r when p=54, q=4 :54 = 4 (4) r³r³ = 54 / 16r³ = 27 / 8r = 3 / 2
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