Answer:
Q3. 67.24 sq. ft.
Q4. 22582.88 sq. cm.
Q6. 115 sq. cm.
Q10. 240 sq. in.
Explanation:
Q3.
The formula of a lateral area of a cube with side s:

We have s = 4.1 ft.
Substitute:

Q4.
The formula of a surface area if a cylinder:

r - radius
H - height
We have 2r = 62 cm → r = 31 cm, H = 85 cm.
Substitute:


Q6.
The surface area of a square piramid is
base - square
lateral sides - four triangles
The formula of an area of a square with sides s:

The formula of an area of a triangle with base b and height h:

We have s = 5 cm, b = s = 5 cm, h = 9 cm.
Substitute:

The surface area:

Q10.
The lateral sides are two pairs of rectangles.
The formula of an area of a rectangle:

l - length
w - width
We have the rectangles:
5 in × 10 in and 7 in × 10 in
Substitute:

The lateral area:
