If in a triangle,the area is numerically equal to the perimeter,then the radius of the inscribed circle of the triangle is

The dimensions of a field are $20 \text{ m}$ by $9 \text{ m}$. $A$ pit $10 \text{ m}$ long,$4.5 \text{ m}$ wide and $3 \text{ m}$ deep is dug in one corner of the field and the earth removed has been evenly spread over the remaining area of the field. What will be the rise in the height of the field as a result of this operation? (in $m$)

If the diagonals of a rhombus are $8$ and $6,$ then the square of its side is

If the area of a triangle whose base is $6\, cm$ is equal to the area of a circle of radius $6\, cm$,then find the height of this triangle (in $cm$).

The diagonal of a square field measures $50 \, m$. The area of the square field is.........$m^2$?

The diameter of a circle is $105 \, cm$ less than its circumference. What is the diameter of the circle? (in $cm$)