Question

if u is inversly proptional to v, and if u=12 when v = 3, find u when v = 9​

Answer 1

Step-by-step explanation:

U ∝ 1/v

or, u = k/v

when, v = 3 & u = 12

.°. 12 = k/3

or, k = 36

when v = 9

.°. u = 36/9 = 4

hence when v = 9 then u = 4

Answer 2

Given,

$u$ is inversely proportional to $v$,

$u=\frac{c}{v}$

 $u=12$ when $v=3$,

$c= uv$

$c=12\times3$

$c=36$

If $v=9$

$uv=36$

$u\times9=36$

$u=\frac{36}{9}$

$u=4$

Therefore, the value of $u$ is $4$.