Find the area of the flower bed (with semicircular ends).

Find the area of the flower bed (with semi-circular ends) shown in figure

Find the area of the flower bed (with semi-circular ends) shown in figure.

The adjoining figure represents a rectangular lawn with a circular flower bed in the middle. Find: (i) the area of the whole land (ii) the area of the flower bed (iii) the area of the lawn excluding the area of the flower bed (iv) the circumference of the flower bed.

. In the following figure,PQRS is square lawn with side PQ=42 metres.Two circular flower beds are there on the sides PS and QR with centre at O,the intersections of its diagonals. Find the total area of the two flower beds (shaded parts).

Each side of a square flower bed is 2m80cm long.It is extended by digging a strip 30cm wide all around it.Find the area of the enlarged flower bed and also the increase in the area of the flower bed.

40.A given quantity of metal is to be cast into a half cylinder with a rectangular base and semicircular ends.Show that in order that the total surface area may be minimum,the ratio of the length of the cylinder to the diameter of its semi-circular ends is w'(

The given quantity of metal is to be cost into a half cylinder with a rectangular base and semicircular ends.Show that in order that the total surface area may be minimum,the ratio of the length of the cylinder to the diameter of its semi-circular ends is pi:(pi+2) .

The inside perimeter of a practice running track with semicircular ends and straight parallel sides is 312 m. The length of the straight portion of the track is 90 m. If the track has a uniform width of 2 m throughout, find its area.

Find the centre of mass of a uniform semicircular ring of radius R and mass M .