If z varies directly as x and inversely asincrease of 12% in x and a decrease of 20% in y.Find the percentageasy. Find the percentage increase in z due to anIfx+1 men will do the work in x + 1 days, find the number of dayfinish the same work.I days, find the number of days that (x+2) men can

If z varies directly as x and inversely asincrease of 12% in x and a d

1.	If z varies directly as x and inversely asincrease of 12% in x and a decrease of 20% in y.Find the percentageasy. Find the percentage increase in z due to anIfx+1 men will do the work in x + 1 days, find the number of dayfinish the same work.I days, find the number of days that (x+2) men can
Answer» Given z∝ (x/y)Hence z = (x/y) assuming proportionality constant as 1.x increase by 12% and y decreases by 20%Hence z value becomes, z = 1.12x/0.8y = 112x/80yChange in z value = (112x/80y) - (x/y)= 32x/80yIncrease in z% = (32x/80y)/(x/y) x 100= (32/80) x 100 = 40%