Tolong jo 11 sama 15 jwb yg bner dong

11. luas persegi panjang : p*l = 15*24 = 360cm'2
luas segitiga :1/2* a*t= 1/2*27*12 = 324cm'2
luas bangun = 360 + 324 = 684 cm'2

12. luas lingkaran :pi*r*r= 3,14*15*15= 706,5 cm'2

13. r : √l/pi = √ 2.464/22/7 = √2.464*7/22 =√784= 28 cm

14. volume tabung : pi*r*r*t = 3,14*2*2*5 = 62,8m'3

15. r =√(3.080*7)/(20*22)= √49 = 7 cm
D= 2*r = 2*7 = 14 cm