Carilah luas permukaan tabung jari-jari 21 cm dan tinggi 9 cm

By Admin ReiPosted on October 28, 2022

Carilah luas permukaan tabung jari-jari 21 cm dan tinggi 9 cm

$2pi {r}^{2} + pi : times d times t$
=2×22/7×21×21 + 22/7 ×42×9
=2×22×3×21+22×6×9
=3960