A. luas selimut = phi x r x s = 3,14 x 6 x 10 = 3,14 x 60 = 188,4 cm² Luas kerucut = phi x r² + phi x r x s = 3,14 x 6 x 6 + 3,14 x 6 x 10 = 113,04 + 188,4 = 301,44 cm²
b. Luas selimut = phi x r x s = 3,14 x 10 x 26 = 816,4 cm² Luas kerucut = phi x r² + phi x r x s = 3,14 x 10 x 10 + 3,14 x 10 x 26 = 314 + 816,4 = 1130,4 cm²
c. Luas selimut 408,2= phi x r x s 408,2= 3,14 x r x 26 408,2= 81,64 x r 408,2/81,64 = r 5 = r r = 5 cm Luas kerucut = phi x r² + phi x r x s = 3,14 x 5 x 5 + 3,14 x 5 x 26 = 78,5 + 408,2 = 486,7 cm²
maaf kalo salah
1 votes Thanks 1
alief2506
coba cek lagi perkaliannya soalnya q cek gak sama seperti jawabanku. mugkin ada yang salah jawabanmu
salsabila630
bukannya luas selimut kerucut itu (phi x r x s) ya
Verified answer
A. luas selimut= phi x r x s
= 3,14 x 6 x 10
= 3,14 x 60
= 188,4 cm²
Luas kerucut
= phi x r² + phi x r x s
= 3,14 x 6 x 6 + 3,14 x 6 x 10
= 113,04 + 188,4
= 301,44 cm²
b. Luas selimut
= phi x r x s
= 3,14 x 10 x 26
= 816,4 cm²
Luas kerucut
= phi x r² + phi x r x s
= 3,14 x 10 x 10 + 3,14 x 10 x 26
= 314 + 816,4
= 1130,4 cm²
c. Luas selimut
408,2= phi x r x s
408,2= 3,14 x r x 26
408,2= 81,64 x r
408,2/81,64 = r
5 = r
r = 5 cm
Luas kerucut
= phi x r² + phi x r x s
= 3,14 x 5 x 5 + 3,14 x 5 x 26
= 78,5 + 408,2
= 486,7 cm²
maaf kalo salah