How to hang a Solid Core door on two 100mm hinges on metal doorframe?

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How to hang a Solid Core door on two 100mm hinges on metal doorframe?

I would like to replace the hollow type door on a bedroom with a Hume Solidcore for soundproofing reasons. The door I had in mind is: https://www.bunnings.com.au/hume-2040-x-820-x-35mm-external-door-duracote-flush-solicore-scx1_p19717...

The existing door frame is metal with two 100mm hinges incorporated (welded) to the frame. The existing door is 2030 x 815 x 35 mm. The doorframe is 2045 x 825 x 35mm.

Can I get a Bunnings installer to install the solidcore door, weighing 35 to 38 kg, using the existing two hinges? I'm happy to accept any risk of not using 3 hinges.

Cheers

Jac