If a : 3 = b : 7 = c : 9, then \(\frac{a+b+c}{a}\)(a+b+c)/a = ?
\( \frac{3}{19} \)
\( \frac{1}{9} \)
\( \frac{19}{3} \)
\( \frac{1}{3} \)
A circle, made of wire, of diameter 49 cm is formed into a rectangle whose sides are in the ratio 7 : 4. Find the area of the rectangle. [Take π = \( \frac{22}{7} \)]