Question 389835
w varies jointly as x and y and inversely as z. if w = 112 when x = 4 and y = 8 and z = 0.2, find w when x = 8, y = 10 and z = 4 (show your solution)
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{{{w(alpha)(xy/z)}}}
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{{{w=k(xy/z)}}}
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w = 112 when x = 4 and y = 8 and z = 0.2
{{{w=k(xy/z)}}}
{{{112=k(4*8/0.2)}}}
{{{112=k(160)}}}
k=112/160
k=7/10
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find w when x = 8, y = 10 and z = 4, k= 7/10
{{{w=k(xy/z)}}}
{{{w=(7/10)*(8*10/4)}}}
w=14
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m.ananth@hotmail.ca