If the volume of this pyramid is 90 cm3, what is its height?
27 cm
3 cm
9 cm
18 cm

Volume of a pyramid =1/3B*H
B is Area of base here base is triangle
so Area of a triangle=1/2*b*h
                                 =1/2*5*12
                                  =30 cm^2

Volume=1/3*30*H
90=1/3*30*h
90*3/30=h
(volume is given)
h=9 cm