Mr. Chong employed some painters and plumbers for his construction site. A plumber was paid $5 a day and a painter was paid $20 a day. Given that he employed 4 times as many painters as plumbers and a total of $170 was paid to these workers for the day, how many more painters than plumbers did Mr. Chong employ for his site?
|
Painters |
Plumbers |
Difference |
Total |
Number |
4 u |
1 u |
3 u |
|
Value |
20 |
5 |
|
|
Total value |
80 u |
5 u |
|
85 u |
Number of plumbers = 1 u
Number of painters = 4 x 1 u = 4 u
Total amount paid
= (4 u x 20) + (1 u x 5)
= 80 u + 5 u
= 85 u
85 u = 170
1 u = 170 ÷ 85 = 2
Number of more painters than plumbers
= 4 u - 1 u
= 3 u
= 3 x 2
= 6
Answer(s): 6