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= 22/7 × 7 ×
=
= 7 pangkat2 + 24 pangkat2
= 49 + 576
= 625
s = akar pangkat 625
= 25
luas selimut kerucut = v x r x s
= 22/7 x 7 x 25
= 22 x 25
= 550 cm