Step 1: Add the parts of the ratio Ratio = 2 : 7, total parts = \( 2 + 7 = 9 \) Step 2: Find the value of one part Total amount = Rs.21600 Value of 1 part = \( \frac{21600}{9} = 2400 \) Step 3: Multiply by B's share (7 parts) B’s share = \( 7 \times 2400 = \boxed{16800} \)