Download App

Mensuration – II (Area of Circle) — MATHS STD 7 — Question

Gujarat BoardEnglish MediumSTD 7MATHSMensuration – II (Area of Circle)2 Marks
Question
Find the radius of a circle whose circumference is: $6.6\ km.$
✓

Answer

Let the radius of the circle be $r\ km.$ Circumference of the circle $(C) =6.6\text{km}$
$\Rightarrow2\times\frac{22}{7}\times\text{r}=6.6$
$\Rightarrow\text{r}=\frac{6.6\times7}{2\times22}=1.05\text{km}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "2 Marks Questions" from Mensuration – II (Area of Circle)→Mensuration – II (Area of Circle) — all question types→MATHS STD 7 question papers→Gujarat Board STD 7 question papers→Gujarat Board question paper generator→

Similar questions

Solve the following.
Sachin scored twice as many runs as Rahul. Together, their runs fell two short of a double century. How many runs did each one score?
→
There are $45$ students in a class and $\frac{3}{5}$ of them are boys. How many girls are there in the class?
→
Find the radius of a circle whose circumference is:
$52.8\ cm.$
→
Simplify and express the following in exponential form: $\Bigg[\Big(\frac{3}{5}\Big)^{3}\times\Big(\frac{3}{5}\Big)^{8}\Bigg]\div\Bigg[\Big(\frac{3}{5}\Big)^{2}\times\Big(\frac{3}{5}\Big)^{4}\Bigg]$
→
Find the following product:
$4a(3a + 7b)$
→
Solve the equation: $10p + 10 = 100$
→
Simplify the following algebraic expressions by removing grouping symbols.
$-2\left(x^2-y^2+x y\right)-3\left(x^2+y^2-x y\right)$
→
Simplify and express the following in exponential form:
$\Big({\frac{5}{2}}\Big)^6\times\Big(\frac{5}{2}\Big)^2$
→
Find the area in square centimeters of a triangle whose base and altitude are as under: Base $= 8\ dm$, altitude $= 15\ cm$
→
Write four more rational numbers in: $\frac{-2}{3}, \frac{2}{-3}, \frac{4}{-6}, \frac{6}{-9}, \ldots \ldots$
→