The phrase 'inadequate for the task' is correct and usable in written English.
You can use it when you want to express that something is not adequate or suitable for a certain task. For example, "The basic tools available were inadequate for the task of repairing the car".
The unusual flaw is that one hour is laughably inadequate for the task in hand.
Pitifully inadequate for the task, and yet, as Amulo's family at the borehole shows, it is saving lives, transforming futures.
Monitoring groups like Amnesty International condemned the summit meeting's outcome as grossly inadequate for the task of protecting vulnerable migrants.
Although it's the colour of Bisto, a glance in the mirror makes it obvious it's woefully inadequate for the task of achieving glorious Apprentice technicolour.
Environmental groups were unanimous in their view that the wider measures were woefully inadequate for the task of tackling what one called "the "greatest challenge the world faces".
He also testified that the Transocean rig crew failed to use lines designed to divert the escaping oil over the side of the rig, using small, low-pressure tanks on the rig instead that were inadequate for the task.
Since November the job of search and rescue has been carried out by the EU's border agency, Frontex, but aid agencies have warned that it is chronically underfunded and woefully inadequate for the the task.
Delaying the Type 26 frigate programme will mean the UK fleet would be "grossly inadequate" for the tasks ahead, Lord West told the defence committee.
The flow charts that are commonly used in the production environment are inadequate for this task, since they only represent the explicit component of the workflow, and are too simplistic.
In addition, it is fairly easy to change the program so as to carry out a new or revised set of tasks should the nature of the process change or the previously proposed system prove to be inadequate for the proposed task.
The procedures developed by some of the authors for signal-independent noise estimation[4] and SAR speckle estimation[14], once they have been extended to two-parameter noise estimation, have been found to be inadequate for the new task, mainly because the overall noise power, though accurately estimated, was not correctly split into its signal-dependent and independent components.
