Question

Circle A has a circumference of

16units. Circle B has an area of 25square units. Which circle has the bigger radius?

Answer 1

#Circle A

`\\ \bull\tt\longmapsto 2πr=16`

`\\ \bull\tt\longmapsto 2(3.14)r=16`

`\\ \bull\tt\longmapsto 6.28r=16`

`\\ \bull\tt\longmapsto r=(16)/(6.28)`

`\\ \bull\tt\longmapsto r=2.6units`

#Circle B

`\\ \bull\tt\longmapsto πr^2=25`

`\\ \bull\tt\longmapsto r^2=(25)/(π)`

`\\ \bull\tt\longmapsto r=\sqrt{(25)/(π)}`

`\\ \bull\tt\longmapsto r=(5)/(√(π))`

`\\ \bull\tt\longmapsto r=(5)/(√(3.14))`

`\\ \bull\tt\longmapsto r=(5)/(1.74)`

`\\ \bull\tt\longmapsto r=2.94units`

Circle B has bigger radius