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1.232 = 1/3 × 22/7 × r² × 24
1.232 = 22/7 × 8 × r²
1.232 = 176/7 r²
r² = 1.232 × 7/176
r² = 49
r = √49
r = 7 cm
b) d = r × 2
d = 7 × 2
d = 14 cm
c) s = √r² + t²
s = √7² + 24²
s = √49 + 576
s = √625
s = 25 cm
d) L. permukaan = π r(r + s)
L. permukaan = 22/7 × 7(7 + 25)
L. permukaan = 22(32)
L. permukaan = 704 cm²