Question

Please help ASAP !!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

1. Area of top circle: 3.14×2² = 12.56

Area of bottom circle: 3.14×2² = 12.56

Area of rectangle: 2pi×2×8 = 100.48

Surface area of cylinder: 125.6 cm²

2. Area of top circle: 3.14×5² = 78.5

Area of bottom circle: 3.14×5² = 78.5

Area of rectangle: 2pi×5×11 = 345.4

Surface area of cylinder: 502.4 cm²

3. Area of top circle: 3.14×8² = 200.96

Area of bottom circle: 3.14×8² = 200.96

Area of rectangle: 2pi×8×15 = 753.6

Surface area of cylinder: 1155.52 cm²

4. Area of top circle: 3.14×2² = 12.56

Area of bottom circle: 3.14×2² = 12.56

Area of rectangle: 2pi×2×5 = 62.8

Surface area of cylinder: 87.92 cm²

Shortcut:

2 × 3.14 × r × (r + h)

Answer 2

Red Box:

Top: 12.57 Top: 78.54

Bottom: 12.57 Bottom: 78.54

Rectangle: 32 Rectangle: 110

SA: 125.66 SA: 502.65

Yellow Box:

#1: 1156.1

#2: 88

Green Box:

#1, Top Left: 3103.9

#2, Bottom Left: 716.3

#3, Top Right: 495.4

#4, Bottom Right: 325.7

Blue Box:

#1: h=8

SA=2πrh+2πr²

527.8=2(3.14)6h+2(3.14)(6)²

527.8=6.28(6)h+(6.28)(6²)

527.8=37.68h+(6.28)(36)

527.8=37.68h+226.08

-226.08 -226.08

301.72=37.68h

301.72/37.68=37.68h/37.68

8=h

#2: h=0.87

Hope This Helps You Out!!!! :)