1.1

240

1.2

697,5

1.3

82,5

1.4

144

1.5

342

1.6

1 299,2

1.7

1 720,210

1.8

16,982

2.1

V = 33022,5
; SA = 7492

2.2

V = 300 763
; SA = 26 934

2.3

V = 4 590
; SA = 2188,645

2.4

V = 129,681
; SA = 123,899

2.5

V = 26 507,188
; SA = 5 466,085

3.1

A = 13,5

3.2

A = 11,142
; perimeter = 14,283

3.3

A = 335

3.4

A = 90 000
; perimeter = 1 600

3.5

A = 86,549
; perimeter = 36,850

4.1

a = √2, b = √3 and c = √4 = 2

The hypotenuse of the first triangle is √2. The hypotenuse of every following
triangle is equal to

√(hypotenuse of previous triangle + 1)

4.2

√5 ; √6 ; √7

4.3

Perimeter = 6

4.4

Area of
first triangle = 0,5; area of second triangle = 0,707 or 0,5√2 and

area of third triangle = 0,866 or 0,5√3

Total area of figure = 2,073

5.1

24,232

5.2

33,353

5.3

30,788

6.1

30,631

6.2

65,597

7.1

77

7.2

No,
the ground close to the plastic cover can not really be used as the vertical
workspace is too small.

7.3

211,665

8.

Remember
that 1 000 litre is equal to 1 cubic metre. Change the 5 000 liter to 5 cubic metre.

Rectangular tank:
possible measurements are width = 1,5 m, breadth = 1,5 m and height = 2,222 m.

Area of
material = 17,832 square metre.

Cube:
Measurements: each side = 1,710 m.

Area of
material is 17,544 square metres.

Cylinder:
Possible measurements are: diameter = 1,784 m and height = 2 m.

Area
of material = 27,417 square metres.