Question

3. The numbers are measurements of radius, diameter, and circumference of circles A and B.Circle Ais smaller than circle B. Which number belongs to which quantity? 2.5, 5, 7,6, 15.2,15.7,47.7

Answer 1

`\begin{gathered} 2.5\text{ is the radius of A.}\Rightarrow r=2.5 \\ 5\text{ is the diameter of A.}\Rightarrow d=2r=2*2.5=5 \\ 15.7\text{is the circumfrence of the A.Circum}=2\pi r=2\pi*2.5=15.7 \\ 7.6\text{ is the radius of B.}\Rightarrow R=7.6 \\ 15.2\text{ is the diameter of B.}\Rightarrow D=2R=2*7.6=15.2 \\ 47.7\text{is the circumfrence of the B.Circum}=2\pi R=2\pi*7.6=47.7 \end{gathered}`