Penjelasan dengan langkah-langkah:

1)

r = √(s² - t²)

r = √(41² - 40²)

r = √(1.681 - 1.600)

r = √81

r = 9 Cm

2) r = 7 Cm || t = 24 Cm || s = √(7²+24²) = 25 Cm

Luas selimut :

= π × r × s

= 22/7 × 7 × 25

= 22 × 25

= 550 Cm²

3) r = 9 Cm || t = 12 Cm || s = √(9² + 12²) = 15 Cm

Luas selimut :

= π × r × s

= π × 9 × 15

= 135π Cm²

4) s = 26 Cm || t = 24 Cm || r = √(26²-24²) = 10 Cm

Luas alas :

= π × r × r

= 3,14 × 10 × 10

= 314 Cm²

5)

Jari jari :

L = π·r²

64π = π·r²

64 = r²

r = 8 Cm

Garis pelukis :

Ls = π·r·s

136π = π·8·s

136 = 8s

s = 17 Cm

Tinggi Kerucut :

t = √(s² - r²)

t = √(17² - 8²)

t = √(289 - 64)

t = √225

t = 15 Cm