Mr. Thia employed some painters and plumbers for his construction site. A plumber was paid $9 a day and a painter was paid $18 a day. Given that he employed 4 times as many painters as plumbers and a total of $162 was paid to these workers for the day, how many less painters than plumbers did Mr. Thia employ for his site?
|
Painters |
Plumbers |
Difference |
Total |
Number |
4 u |
1 u |
3 u |
|
Value |
18 |
9 |
|
|
Total value |
72 u |
9 u |
|
81 u |
Number of plumbers = 1 u
Number of painters = 4 x 1 u = 4 u
Total amount paid
= (4 u x 18) + (1 u x 9)
= 72 u + 9 u
= 81 u
81 u = 162
1 u = 162 ÷ 81 = 2
Number of less plumbers than painters
= 4 u - 1 u
= 3 u
= 3 x 2
= 6
Answer(s): 6