Question

If x y, answer the following. (i) When x=9, y = 15, find y when x = 30. (ii) When x = 28, y = 32, find y when x = 21. (iii) When x = 8, y = 36, find x when y = 72.

i want step by step explanation​

Answer 1

Step-by-step explanation:

(i) x=9,y=15

Find the answer by finding though ratio and proportion

x:y::x:y = 9:15::30:y

product of means = product of extremes

15× 30= 9× y

450= 9×y

y= 450/9=50