Mr. Goh employed some plumbers and painters for his construction site. A painter was paid $7 a day and a plumber was paid $15 a day. Given that he employed 5 times as many plumbers as painters and a total of $164 was paid to these workers for the day, how many less plumbers than painters did Mr. Goh employ for his site?
|
Plumbers |
Painters |
Difference |
Total |
Number |
5 u |
1 u |
4 u |
|
Value |
15 |
7 |
|
|
Total value |
75 u |
7 u |
|
82 u |
Number of painters = 1 u
Number of plumbers = 5 x 1 u = 5 u
Total amount paid
= (5 u x 15) + (1 u x 7)
= 75 u + 7 u
= 82 u
82 u = 164
1 u = 164 ÷ 82 = 2
Number of less painters than plumbers
= 5 u - 1 u
= 4 u
= 4 x 2
= 8
Answer(s): 8