3 votes 3 votes X,Y and Z are 3 quantities.X varies inversely with Y when z is constant.Y varies inversely with Z when X is constant.When Y=8,Z=7 and X=30.Find X if Y=16 and Z=21 Quantitative Aptitude ratio-proportion + – Uma Maheswari asked Dec 25, 2017 Uma Maheswari 286 points 1.8k views answer comment Share See all 0 reply Please log in or register to add a comment.
Best answer 2 votes 2 votes Three quantities are varying based on one another but their product always remain constant i.e The overall change (global change) is always constant $\therefore \ 8 \times \ 7 \times 30 = X \ \times 16 \times 21 \\ $ $\color{Red}{X=5}$ saxena0612 answered Dec 25, 2017 • selected Dec 25, 2017 by Arjun saxena0612 950 points comment Share See all 0 reply Please log in or register to add a comment.