A park in the shape of a right-angled triangle with two perpendicular sides of measures $12$ m and $5$ m is fenced. Find the total cost of fencing, if the cost of fencing the wire per metre is Rs. $62.50$ and the charges paid for fencing is Rs. $700.$ Also, find the area of the park.

Find the area and circumference of the following circles whose:

$r=3.5 \text{cm}$

Find the area and circumference of the following circles whose:

$d=21 \text{cm}$

Find the area and circumference of the following circles whose:

$r=10.5 \text{m}$

Find the area and circumference of the following circles whose:

$d=4 \text{cm }\left(\text{use} \pi =3.14\right)$

Find the area and circumference of the following circles

$\text{r = 20 cm (use π=3.14)}$

Find the area and circumference of the following circles

$\text{d = 12 cm (use π=3.14)}$

Find the area of the following rings:

$\text{R = 7 cm and r = 3.5 cm}$

Find the area of the following rings:

$\text{R =10.5 cm and r = 3.5 cm}$