bryantjorell
04.02.2022 •
Mathematics
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
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Ответ:
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:
Ответ:
Belinda lives 1.5 times further than Jamie does from school
Jamie lives 4.2 miles from school
1.5 X 4.2 = 6.3
Belinda lives 6.3 miles away from school