Question

14. If x and y vary inversely and x = 15 when y = 6, find y when x = 9.
15. If x and y vary inversely and x = 18 when y = 8, find x when y = 16.​

Answer 1

Answer:

Proportional method

15:6::9:y

Since, product of means=product of extremes

15y=6×9

y=6×9/15

y=54/15

y=18/5

18:8::x:16

Since, product of means=product of extremes

18×16=8x

x=18×16/8

x=36

Hope it helps......