It is known that, Area of rectangle $$= Length \times Breadth$$
(a) $$l = 9\ m, b = 6\ m$$
$$Area = l\times b = 9\times 6 = 54\ m^{2}$$
(b) $$l = 17\ m, b = 3\ m$$
$$Area = l\times b = 17\times 3 = 51\ m^{2}$$
(c) $$l = 4\ m, b = 14\ m$$
$$Area = l\times b = 4\times 14 = 56\ m^{2}$$
Its can be seen that rectangle (c) has the largest area and rectangle (b) has the smallest area.