Question

The adjoining figure shows the inner boundary of a
400 m running track which has two parallel straight
portions, each of length 130 m and two semicircular ends
(as shown in the figure). Calculate the area enclosed by
the inner boundary.​

Answer 1

Answer:

7352 m². The circumference of the two semicircles is equal to 400 - 260

2πr= 260

Area ={[130*2r]+[2(πr²/2)]}