The two semi circles come together to form one circle Hence their total perimeter C= πd ,d= 4 + 4 = 8 = π x 8 = 25.13 cm
Considering the perimeter b/n the two semi circles . That figures also form a square when combined perimeter of a square is P= 4L With L =4 P= 4(4) = 16 cm
... because you divide the time but the distance so for this question you divide 22.5 by 5 and that's your answer. do the same for every question! hope this helps.
