A worker with

$3$

$$L

$/$

min PWC performs a lifting task. An industrial engineer records

his steady

$-$

state task performance VO

$2$

$$consumption and finds it as

$2$

$$L

$/$

min

$($

average

$)$

$.$

$$Determine the worker

$`$

s endurance time

$($

ET

$)$

$.$

$$That is

$,$

$$how long the

worker will continue to work for the given task before he fatigues.