area of base = 5 ft²
the volume (V) of a cone is calculated using the formula
V = [tex]\frac{1}{3}[/tex]Ah ( A is the area of base and h the height )
substitute given values into the formula
35 = 7A ( divide both sides by 7 )
A = [tex]\frac{35}{7}[/tex] = 5 ft²
