Hitunglah diameter alas kerucut jika diketahui luas kerucut 1232 cm2 dan garis lukis kerucut 28 cm?
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Luas = 1232 cm^2
s=28 cm
Luas selimut =πrs
πrs=1232
22/7.r.28=1232
22.4.r=1232
88.r=1232
r=1232/88
r=14 cm
Diameter=2 x r
2 x 14
28 cm
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=Akar(luas ×7 ÷22) ×2
=akar (1232 × 7 : 22 )×2
=akar 748
=28cm/segi