Question 8The ratio of the length to the width of a rectangle is $4 : 3.$ If the rectangle has diagonal of length $d,$ then the area may be expressed as $kd^2$ for some constant $k.$ What is $k?$$\dfrac{2}{7}$$\dfrac{3}{7}$$\dfrac{12}{25}$$\dfrac{16}{25}$$\dfrac{3}{4}$