The area of a square field is 900 m2. How much time will a girl take to run 10 times around it at the speed of 6 km/h

Area of square field = 900 m²

To find :

Time to take 10 round with the speed of 6 km/h

Now, firstly we'll find the distance for one round which is perimeter of the square field.

=> Perimeter = 4 × side.

We'll find side the helps of area

=> Area = 900 m²

=> Side × Side = 900

=> Side = √900

=> Side = 30 m

Now, perimeter of the field

=> Perimeter = 4 × 30

=> Perimeter = 120 m

Now, he have to take 10 round,. so distance covered in 10 round will be 10 × distance in one round

=> Total distance = 10 × 120

=> Total distance = 1200 m

Now we'll find time

=> Time = Distance/speed

Now the distance is in meter and we have to convert it in Km

=> 1200 m = 1200/1000 km

=> 1200 m = 1.2 km

Now putting all the values

=> Time = Distance/speed

=> Time = 1.2 / 6

=> Time = 0.2 hour

Or

=> Time = 0.2 × 3600 seconds

=> Time = 720 seconds.

Hope It Helps.

Step-by-step explanation:

$15 each

step-by-step explanation:

$45/3 children= $15 each