Complete the table below : Sr. NoRadius (r)Diameter (d)Circumference (c)i.7 cm ii. 28 cm iii. 616 cmiv. 72.6 cm

"i. Radius (r)=7 cm Diameter ( d )=2 r =2 7=14 cm Circumference (c) = d =22 7 14 =44 cm ii. Diameter ( d )=28 cm Radius (r)=d 2 =28 2 =14 cm Circumference (c)= d & =22 7 28 & =88 cm & iii. Circumference ( c )=616 cm & d =616 & 22 7 d =616 & d =616 7 22 & d =196 cm & Diameter (d) =196 cm & Radius ( r )= d 2 =196 2 =98 cm & iv. Circumference ( c )=72.6 cm & d =72.6 & 22 7 d =72.6 & d=72.6 7 22 =726 10 7 22 =33 7 10 & d =23.1 cm & Diameter ( d )=23.1 cm & Radius ( r )= d 2 =23.1 2 & =11.55 cm Sr. NoRadius (r)Diameter (d)Circumference (c)i.7 cm14 cm44 cmii.14 cm28 cm88 cmiii.98 cm196 cm616 cmiv.11.55 cm23.1 cm72.6 cm

Complete the table below : Sr. NoRadius (r)Diameter (d)Circumfere…

Download App

Question

Complete the table below :

Sr. No	Radius (r)	Diameter (d)	Circumference (c)
i.	7 cm
ii.		28 cm
iii.			616 cm
iv.			72.6 cm

✓

Answer

"i. Radius $(r)=7 cm$
Diameter $( d )=2 r$ $=2 \times 7=14 cm$
Circumference (c) $=\pi d$ $=\frac{22}{7} \times 14$
$=44 cm$ ii. Diameter $( d )=28 cm$
Radius $(r)=\frac{d}{2}=\frac{28}{2}=14 cm$
Circumference $(c)=\pi d$
$
\begin{aligned}
& =\frac{22}{7} \times 28 \\
& =88 cm
\end{aligned}
$ \begin{aligned}
& \text { iii. Circumference }( c )=616 cm \\
& \therefore \pi d =616 \\
& \therefore \frac{22}{7} \times d =616 \\
& \therefore d =616 \times \frac{7}{22} \\
& \therefore d =196 cm \\
& \therefore \text { Diameter (d) }=196 cm \\
& \text { Radius }( r )=\frac{ d }{2}=\frac{196}{2}=98 cm
\end{aligned} \begin{aligned}
& \text { iv. Circumference }( c )=72.6 cm \\
& \therefore \pi d =72.6 \\
& \frac{22}{7} \times d =72.6 \\
& \therefore d=72.6 \times \frac{7}{22}=\frac{726}{10} \times \frac{7}{22}=\frac{33 \times 7}{10} \\
& \therefore d =23.1 cm \\
& \therefore \text { Diameter }( d )=23.1 cm \\
& \text { Radius }( r )=\frac{ d }{2}=\frac{23.1}{2} \\
& =11.55 cm
\end{aligned}