Question

Identify the variation as direct, inverse, joint or combined. l=cmn

Answer 1

The answer is joint i could be wrong but hope this helps

Answer 2

Answer:

The variation is joint variation.

Step-by-step explanation:

The given equation is,

$I=c\cdot m\cdot n$

where

c is the proportionality constant.

So,

$I\propto m\cdot n$

This can be segregated as,

$I\propto m$ and $I\propto n$

Therefore, I is in direct variation with m and n separately. But as both variations are of same type, so I is in joint variation with m and n.