Question

a garden consists of a pool surrounded by lawn. the garden is 20m x 15 m and the pool is 5m x 3m. what is the lawn area?

Explanation:

Step1: Calculate garden area

The garden is a rectangle with length \( 20 \, \text{m} \) and width \( 15 \, \text{m} \). The area of a rectangle is \( \text{length} \times \text{width} \), so the area of the garden is \( 20 \times 15 = 300 \, \text{m}^2 \).

Step2: Calculate pool area

The pool is a rectangle with length \( 5 \, \text{m} \) and width \( 3 \, \text{m} \). Using the rectangle area formula, the area of the pool is \( 5 \times 3 = 15 \, \text{m}^2 \).

Step3: Calculate lawn area

The lawn area is the garden area minus the pool area. So, \( 300 - 15 = 285 \, \text{m}^2 \).

Answer:

285 \( \text{m}^2 \) (the option with 285 \( \text{m}^2 \))