Mensuration - II (Area of Circle) — Maths STD 7 — Question
Maharashtra BoardEnglish MediumSTD 7MathsMensuration - II (Area of Circle)2 Marks
Question
Find the diameter of a circle whose circumference is:
11.0km.
✓
Answer
Let the radius of the circle be r km.Circumference of the circle (C) $=11.0\text{km}$
$\Rightarrow2\times\frac{22}{7}\times\text{r}=11$
$\Rightarrow\text{r}=\frac{11\times7}{2\times22}=1.75\text{km}$
Now, diameter $=2\times\text{r}=2\times1.75=3.5\text{km}$
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