If z varies directly as x and inversely as y. Find the percentage increase in z due to an increase of 12% in x and decrease of 20% in y
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Given zronies directly x and inversely as 4
Hence z=(x/4). Assuming proportionate constant 1x, is increased by 12% and y is decreased by 20%
z=1.12x/0.8y
z=112x/80y
Change in volume nz
=(112×8/80y)−(x/y)
=32×/80y
Increase in 2
′
s percentage
=(32x/80y)÷(x/y)×100
=40%
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Given zronies directly x and inversely as 4
Hence z=(x/4). Assuming proportionate constant 1x, is increased by 12% and y is decreased by 20%
z=1.12x/0.8y
z=112x/80y
Change in volume nz
=(112×8/80y)−(x/y)
=32×/80y
Increase in 2
′
s percentage
=(32x/80y)÷(x/y)×100
=40%
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