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b) The area of a square garden is 625 m².
(i) Find the length and breadth of the garden.
(ii) If the length and breadth each is increased by 2 m, by how many squar
metre is the area of the garden increased?


Sagot :

Certainly! Let's solve this step-by-step:

### Part (i): Finding the length and breadth of the garden
Since the area of a square is given by the formula:

[tex]\[ \text{Area} = \text{side} \times \text{side} \][/tex]

We can denote the side length of the square garden by [tex]\( s \)[/tex]. Given the area of the garden is 625 m²:

[tex]\[ s \times s = 625 \][/tex]
[tex]\[ s^2 = 625 \][/tex]

To find the side length, we take the square root of 625:

[tex]\[ s = \sqrt{625} \][/tex]
[tex]\[ s = 25 \text{ meters} \][/tex]

So, the length and breadth of the square garden are each 25 meters.

### Part (ii): Calculating the increase in area when the length and breadth are increased by 2 meters
If the length and the breadth of the garden are each increased by 2 meters, the new side length of the square garden will be:

[tex]\[ \text{New side length} = 25 + 2 = 27 \text{ meters} \][/tex]

Now, we find the new area of the garden with the increased side length:

[tex]\[ \text{New area} = 27 \times 27 = 729 \text{ m}^2 \][/tex]

Next, we need to determine the increase in area:

[tex]\[ \text{Increase in area} = \text{New area} - \text{Initial area} \][/tex]
[tex]\[ \text{Increase in area} = 729 - 625 \][/tex]
[tex]\[ \text{Increase in area} = 104 \text{ m}^2 \][/tex]

So, the area of the garden is increased by 104 square meters when the length and breadth are each increased by 2 meters.