Question
Find the circumference of a circle whose diameter is:7cm.
✓
Answer
We know that the circumference of a circle of radius r is given by C $=2\pi\text{r}$
Here, d = 7cm
Then, r = 1 = 3.5cm
$\Rightarrow\text{C}=2\times\frac{22}{7}\times3.5=22\text{cm}$
Here, d = 7cm
Then, r = 1 = 3.5cm
$\Rightarrow\text{C}=2\times\frac{22}{7}\times3.5=22\text{cm}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Find the square root : 1225
Subtract:
-8xy from 7xy
-8xy from 7xy
Find the mean of first six odd natural numbers.
Multiply:
$3\frac{4}{15}\text{ by }{24}$
→$3\frac{4}{15}\text{ by }{24}$
A horse is tied to a pole with 28m long string. Find the area where the horse can graze. $\Big(\text{Take }\pi=\frac{22}{7}\Big).$
→Represent the following rational numbers on the number line:
$\frac{22}{7}$
→$\frac{22}{7}$
₹PTNM is a rectangle. Write the names of the pairs of supplementary angles.
Find:$\frac{3}{20}\text{ of a kg}$
→Use an expansion formula to find the values of : (102)²
Find the product:
6.54 × 0.09
6.54 × 0.09