Solving for the Unknown - Basic Mathematics for Water and Wastewater Operators - page 124

■ Example 8.31
Problem:

x 2 × 12 × 7.48 = 11,112.4

Solution:

2

x ×= 89 811 112 4

11 112 4
89 8
124

. , .

, .

2

x =

.

2

x =

2

x = 124

x = 11 14 .

■ Example 8.32
Problem:

75 000
0 785

,

61 =

2

. × D

Solution:

75 000
61 0 785
75 000
47 9
1565 8

,

2

D =

× .

,

2

D =

.

2

D = .

2

D = 1 565 8 .

D = 39 57 .

■ Example 8.33
Problem:

0.785 × D 2 = 0.66

Solution:

066
0 785
0 8407

.

2

D =

.
.

2

D =

2

D
D

=
=

0 8407
0 917

.

.