Question

Someone help me, as i cannot figure the answer!!!

Answer 1

Total surface area: 34.2888m²

Cans: 7

Explanation:

Radius = 1.4/2 = 0.7

Surface area = 2pi × r × (r + h)

2 × 3.14 × 0.7 × (0.7 + 1.9)

11.4296 m³

For 3 cans:

3 × 11.4296

34.2888 m²

No. of cans:

34.2888/5

6.85776

Answer 2

7 tins of paint

Explanation:

Surface Area of a Cylinder: 2(3.14)(r)(h) + 2(3.14)(r^2)

Radius: 0.7m

Height: 1.9m

Plug them in:

SA: 2(3.14)(0.7)(1.9) + 2(3.14)(0.7^2)

SA: 6.28(1.33)+6.28(0.49)

SA: 8.3524 + 3.0772

SA: 11.4296

Surface Area of Each Tank: 11.43m^2

11.43^2 x 3 = 34.29m^2

34.29m^2/5m^2 = 6.858 tins of paint rounded to 7 since you can't have 6.858 tins of paint