Mr. Chiam employed some painters and plumbers for his construction site. A plumber was paid $9 a day and a painter was paid $17 a day. Given that he employed 3 times as many painters as plumbers and a total of $240 was paid to these workers for the day, how many less painters than plumbers did Mr. Chiam employ for his site?
|
Painters |
Plumbers |
Difference |
Total |
Number |
3 u |
1 u |
2 u |
|
Value |
17 |
9 |
|
|
Total value |
51 u |
9 u |
|
60 u |
Number of plumbers = 1 u
Number of painters = 3 x 1 u = 3 u
Total amount paid
= (3 u x 17) + (1 u x 9)
= 51 u + 9 u
= 60 u
60 u = 240
1 u = 240 ÷ 60 = 4
Number of less plumbers than painters
= 3 u - 1 u
= 2 u
= 2 x 4
= 8
Answer(s): 8