An athletic track 14m wide consists of two straight section 120m long joining semi-circular ends whose inner radius is 35m. Calculate the area of the shaded shaded region.

An athletic track 14 m wide consists of two straight sections 120 m long joining and semicircular ends inner diameter 35 m . find area of track

Find the area of a circular park whose radius is 4.5 m

A circular running track has inner radius 126 m and outer radius 140 m . Find the area of the track .

In the given figure ABCD is a rectangle. It consists of a circle and two semi-circles each of which are of radius 5 cm. Find the area of the shaded region. Give your answer correct to three significant figures.**

A path of width 3.5 m runs around a semi-circular grassy plot whose perimeter is 72 m. Find the area of the path. (U s e\ \ pi=22//7)

If Figure, there are three semicircles, A, B and C having diameter 3cm each, and another semicircle E having a circle D with diameter 4.5cm are shown. Calculate: the area of the shaded region. the cost of painting the shaded region at the rate of 25 paise per c m^2 , to the nearest rupee.

The cross-section of a tunnel is a square of side 7 m surmounted by a semicircle. The tunnel is 80 m long Calculate : the surface area of the tunnel (excluding the floor) .

A 40 kg flywheel in the form of a uniform circular disc of 1 m radius is rotating at 120 rpm. Calculate the angular momentum.

The inside perimeter of a running track (shown in figure) is 400m. The length of each of the straight portion is 90m and the ends are semi-circles. If the track is everywhere 14m wide, find the area of the track. Also find the length of the outer running track.

The inner perimeter of a running track (shown in figure) is 400 m. The length of each of the straight portion is 90 m and the ends are semicircular. If the track is everywhere 14 m wide, find the area of the track. Also, find the length of the outer running track.