How far a andesitic lava can flow and what is the speed?
Andesitic lava is viscous, compared to basaltic lava. Andesitic lava flows at a rate of a few kilometers per hour, whereas basaltic lava can flow up to 10 km/h. Because of their viscosity, andesitic lavas "rarely extend beyound 8 km from their vents".

Viscosity of andesite lava and its implications for possible drain-back processes in the 2011 eruption of the Shinmoedake volcano, Japan

Pulsatory andesite lava flow at Bagana Volcano

Volcanoes, Magma, and Volcanic Eruptions - Tulane University