Answer:
Step-by-step explanation:
1. SA=2πrh + 2πr²
= 2π (3cm) (10m) + 2π (3cm)²
= 2π (3000cm) + 2π (9cm)
= 6.28 x 3000cm + 6.28 x 9cm
=18,840cm +56.52 cm
SA= 18,896.52cm or 188.9652m
2.SA=4πr²
=4π x (12 inches)²
= 6.28 x 144 inches
=904.32 inches
3.SA=πrs + πr²
=3.14 x 14cm x 33cm + 3.14 x (14cm)²
=1,450.68cm + 3.14 x 196cm
=1,450.68cm + 615.44cm
=2,066.12cm
