Question

find the volume of water to be filled in a cube a cubical container in the internal measurement of its base is 3 m

Answer 1

Hey there !!   The volume of water to be filled in a cubical container = a³  Volume of cube = 3³  Volume = 27m³  Hence , the volume of water to be filled in cube will be 27m³   Hope it helps ,,   If any more doubts left than comment in comment box .