**(a) The figure (i) given below shows a running track surrounding a grassed enclosure PQRSTU. The enclosure consists of a rectangle PQST with a semicircular region at each end.**

**PQ = 200 m ; PT = 70 m.**

**(i) Calculate the area of the grassed enclosure in m2.**

**(ii) Given that the track is of constant width 7 m, calculate the outer perimeter ABCDEF of the track.**

**(b) In the figure (ii) given below, the inside perimeter of a practice running track with semi-circular 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.**

**Solution:**