The correct option is (B):
Explanation: To determine the area of playground P, let's evaluate the statements:
- Statement A: "The playground is rectangular in shape and is 120 metres wide."
This only provides the width of the playground, but without the length, we cannot calculate the area. Therefore, Statement A alone is insufficient.
- Statement B: "The playground is square in shape and has a side with a length of 120 metres."
For a square, the area is simply the square of the side length. Since the side length is provided as 120 metres, we can calculate the area as:
\[\text{Area} = 120 \times 120 = 14,400 \text{ square metres}\]
Thus, Statement B alone is sufficient** to determine the area of the playground.
The correct answer is: B: If the question can be answered with the help of statement 'B' alone.