Question

A person walks at the rate of 4km hour how long will he take to go round a square park 5times whose area is 2500 m square​

Answer 1

$\huge\mathfrak{Answer:}$

Given:

• We have been given that the area of a square park is 2500m².
• A person walks at the rate of 4km/hr around the park.

To Find:

• We need to find the time he will take to complete five rounds around the park.

Solution:

We have been given that the area of the square park is 2500m².

Therefore, side of park

$\sf{ = \sqrt{2500} }$

$\sf{ = 50m}$

We know that the perimeter of a square is 4 × side

$\sf{ = 4 \times 50}$

$\sf{ = 200m}$

The person has to move around the park five times, hence the distance he has to cover =

$\sf{5 \times 200}$

$\sf{ = 1000 {m}^{2} }$

We know that 1000m = 1km.

Now, the time taken by him to cover a distance of 1000m²

$\sf{(\dfrac{4km}{60min} ) \times 1km}$

$\sf{ = 1km \: per \: 15minutes.}$

Hence, the person will take 15 minutes to complete 5 rounds around the park.