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1232 = 1/3 × 22/7 × 7 × 7 ×t
3696 = 22 × 7 × t
3696 = 154 t
t = 24 cm
s^2 = t^2 + r^2
s^2 = 24^2 + 7^2
s^2 = 576 + 49
s^2 = 625
s = akar 625
s = 25 cm
luas selimut
= phi × r × s
= 22/7 × 7 × 25
= 22 × 25
= 550 cm^2