luas permukaan bangun pada gambar di samping

r = 14 cm
T limas = 24 cm

t segitiga limas (t) = akar [(T limas)^2 + (1/2 r)^2]
= akar [24^2 + (1/2×14)^2]
= akar [24^2 + 7^2]
= akar [576 + 49]
= akar 625
= 25 cm

L permukaan bangun
= [5 × r^2] + [4 × 1/2 × r × t]
= [5 × 14^2] + [4 × 1/2 × 14 × 25]
= [5 × 14 × 14] + [4 × 1/2 × 14 × 25]
= 980 + 700
= 1680 cm^2