Question

Please help me ASAPPPPPP

Answer 1

Explanation:

4). Surface area of front and back = 2(lengh × height)

= 2(7×3)

= 63 cm²

Surface area of top and bottom = 2(length × width)

= 2(8×7)

= 112 cm²

Surface area of left and right = 2(width × height)

= 2(8×3)

= 48 cm²

Total surface area = 63 + 112 + 48

= 223 cm²

5). Surface area of top and bottom = 2πr²

= 2π(4)²

= 32π

= 100.53 cm²

Surface area of middle = h(π × d)

= 4(π × 8)

= 32π

= 100.53 cm²

Total surface area = 32π + 32π

= 64π

= 201.06 cm²

6). Surface area of front and back =
`2[(1)/(2)(\text{Base})(\text{Height)}]`

= Base × Height

= 6 × 8

= 48 cm²

Surface area of bottom = 6 × 11

= 66 cm²

Surface area of the left = 8 × 11

= 88 cm²

Surface area of right = 10 × 11

= 110 cm²

Total surface area = 48 + 66 + 88 + 110

= 312 cm²