Mialock2108 Mialock2108

18-07-2017
Mathematics

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Y varies jointly with w and z inversely with x. If y=36, when x=14, w=7 and z=8. Then what is y when x=20, w=16, and z=10?

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Аноним Аноним

18-07-2017

y = kwz / x

36 = k*7*8 / 14 = 56k/14 = 4k

k = 36 / 4 = 9

so equation is y = 9wz/x

when x=20,w=16 and z=10:-

y= 9* 16*10 / 20 = 72

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