Mensuration - II (Area of Circle) — Maths STD 7 — Question
Maharashtra BoardEnglish MediumSTD 7MathsMensuration - II (Area of Circle)2 Marks
Question
Find the radius of a circle whose circumference is:
42cm.
✓
Answer
Let the radius of the circle be r cm. Circumference of the circle (C) $=42\text{cm}$$\Rightarrow2\times\frac{22}{7}\times\text{r}=42$
$\Rightarrow\text{r}=\frac{42\times7}{2\times22}=6.68\text{cm}$
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