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25 July, 12:32

Y varies jointly as x and z. y = 56 x=4 and z = 7. Find y when x=8 and z=5

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  1. 25 July, 16:30
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    Y varies jointly as x and z, here means y is proportional to x and z.

    y = k*x*z

    56 = k*4*7

    k = 2

    y = 2*8*5

    y = 80.
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