R:7 cm timggi21 cm phi 22/7 A. Tehtukan luas selimut tabung B. Luas tabung tanpa yutup C. LuaS tabung D volume tabung

A. L = 2 × phi × r × t

= 2 × 22/7 × 7 × 21

= 2 × 22 × 7 × 3

= 44 × 21

= 924 cm^2


B. L = phi × r × (r + 2 × t)

= 22/7 × 7 × (7 + 2 × 21)

= 22 × 1 × (7 + 42)

= 22 × 1 × 49

= 1.078 cm^2


C. L = phi × r^2

= 22/7 × 7^2

= 22/7 × 49

= 22 × 7

= 154 cm^2


D. V = phi × r^2 × t

= 22/7 × 7^2 × 21

= 22/7 × 49 × 21

= 22 × 7 × 21

= 3.234 cm^2