We know that [volume of a cone]=pi*r²*h/3 h=30 cm volume=1440*pi cm³ r²=3*volume/[pi*h]------> r²=3*1440*pi/[30*pi]----> r²=144-------> r=√144 r=12 cm so the diameter=2*r------> 2*12-----> 24 cm
the answer is <span>the diameter of the cone's base is 24 cm</span>
