Maharashtra Board Solutions for Exercise 6: Practice Set 15.6

Radius of a circle is $28 \mathrm{cm}$. If the area is $k {\mathrm{cm}}^2$. Then find the value of $k$. [Take $\pi =\frac{22}{7}$]

Radius of a circle is $10.5 \mathrm{cm}$. If the area of the circle is $A {\mathrm{cm}}^2$, then find the value of $A$. [Take $\pi =\frac{22}{7}$]

Radius of a circle is $17.5 \mathrm{cm}$. If the area of the circle is $A {\mathrm{cm}}^2$, then find the value of $A$. [Take $\pi =\frac{22}{7}$]

Areas of a circle is $176 \mathrm{sq} \mathrm{cm}$. If the diameter is $4\sqrt{k} \mathrm{cm}$, find the value of $k$. [Take $\pi =\frac{22}{7}$]

Areas of a circle is $394.24 \mathrm{sq} \mathrm{cm}$. If the diameter is $k.4 \mathrm{cm}$, then find the value of $k$. [Take $\pi =\frac{22}{7}$]

Areas of a circle is $12474 \mathrm{sq} \mathrm{cm}$. If the diameter is $k \mathrm{cm}$, then find the value of $k$. [Take $\pi =\frac{22}{7}$]

The diameter of the circular garden is $42 \mathrm{m}$. There is a $3.5 \mathrm{m}$ wide road around the garden. If the area of the road is $k.5 {\mathrm{m}}^2$, then find the value of $k$. [Take $\pi =\frac{22}{7}$]

The area of the circle is $k {\mathrm{cm}}^2$.  If its circumference is $88 \mathrm{cm}$, then find the value of $k$.[Take $\pi =\frac{22}{7}$]