Subject Experts Solutions for Chapter: Perimeter and Area, Exercise 13: Let Us Try 12.3

The circumference of a circle of radius $14 \mathrm{c}\mathrm{m}$ is _____ $\mathrm{cm}$.

The diameter of a circle with a circumference of $22 \mathrm{c}\mathrm{m}$ is _____ $\mathrm{cm}$.

If the circumference of a circle is $88 \mathrm{c}\mathrm{m}$, its area is _____ ${\mathrm{cm}}^2$.

The circumference of a circular disc of radius $21 \mathrm{c}\mathrm{m}$ is _____ $\mathrm{cm}$.

The area of a circle of radius $25 \mathrm{c}\mathrm{m}$ is _____ ${\mathrm{cm}}^2$. (Take $\mathrm{\pi }=3.14$) 

The area of a circle of radius $3.5 \mathrm{c}\mathrm{m}$ is _____ ${\mathrm{cm}}^2$

If the area of a circular tin plate is $38.5 {\mathrm{m}}^2$, its circumference is _____ $\mathrm{m}$.

A circle of radius $3 \mathrm{c}\mathrm{m}$ is cut out from a square piece of metal sheet of side $8 \mathrm{cm}$. Find the area of the leftover metal sheet.

$($ Take $\pi =3.14)$