Question

A garden roller has a circumference of 3m. How many revolutions does it makes in moving a distance of 21m.​

Answer 1

Answer :

• 7 revolutions it makes in moving a distance of 21m

Given :

• Circumference is 3m
• Total distance is 21m

To find :

• Number of revolutions

Solution :

Given that ,

• Circumference is 3m and total distance is 21m so ,

Number of revolutions = Total distance/Circumference

》21/3

》7

Hence , 7 revolutions it makes in moving a distance of 21m

More Explanation :

• Circumference of circle = 2πr
• Area of circle = πr²
• Perimeter of semi circle = πr + 2r
• Perimeter of circle = 2πr
• Circumference of circle is nothing but the measurement of boundary of circle
• Where , r is radius and π is pi

Answer 2

Total Distance = 21 m

Circumference = 3 m

therefore,

Number of revolutions = Total Distance/ Circumference of the circle

Number of revolutions = 21/3 = 7m