MD-11
Ok, I punched a couple of numbers into the performance software, starting with 3000m TORA going up to 3600m in 100m increments, no slope, no clearway, no stopway.
Elevation was MSL, ISA standard day (15°C, 1013 hPa), power optimum, flaps optimum, A/I off and A/C off.
You can take out the max. TOW (286.0 t) with a TORA of 3300m, using max. power and a flap setting of 23.5°. 3200m would give you 285.8t being Performance and Field Length limited.
With a temperature of 20°C on MSL it is just the same... 3300m TORA is sufficient to take out 286.0t.
But if you meant ISA+20°C, i.e. 35°C at MSL, you need 3600m TORA for MTOW. 3500m is only good enough for 283.2t.
Regards