Whats the volume of a cylinder with a diameter of 10 cm and its height is 7cm?

Diameter, d = 10cm
Height, h = 7cm

Area of cylinder base = (pi x d^2)/4
                      = (3.14 x 10^2)/4
              =78.5 sq.cms

Volume = base area x height
    = 78.5 x 7
    = 549.5 cubic cms