Question

Plz help me to solve this all answer.

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Answer 1

Explanation:

The formula of a circumference of a circle with radius r:

`C=2\pi r`

Solve for r:

`2\pi r=C` subtitute
`\pi\approx(22)/(7)`

`2\cdot(22)/(7)r=C`

`(44)/(7)r=C` multiply both sides by 7

`44r=7C` divide both sides by 44

`r=(7C)/(44)`

Substitute the values of the circumference from your question:

`i.\ C=88cm\\\\r=(7\cdot88)/(44)=(7\cdot2)/(1)=12(cm)\\\\=================`

`ii.\ C=1.4m\\\\r=(7\cdot1.4)/(44)=(9.8)/(44)=(98)/(440)=(49)/(220)(m)\\\\====================`

`iii.\ C=16m\\\\r=(7\cdot16)/(44)=(7\cdot4)/(11)=(28)/(11)(m)\\\\=================`

`iv.\ C=33ft\\\\r=(7\cdot33)/(44)=(7\cdot3)/(4)=(21)/(4)(ft)\\\\=================`

`v.\ C=5m\\\\r=(7\cdot5)/(44)=(35)/(44)(m)\\\\===============`

`vi.\ C=66m\\\\r=(7\cdot66)/(44)=(7\cdot3)/(2)=(21)/(2)(m)\\\\================`