Mr. Sim employed some welders and painters for his construction site. A painter was paid $7 a day and a welder was paid $13 a day. Given that he employed 3 times as many welders as painters and a total of $138 was paid to these workers for the day, how many more welders than painters did Mr. Sim employ for his site?
|
Welders |
Painters |
Difference |
Total |
Number |
3 u |
1 u |
2 u |
|
Value |
13 |
7 |
|
|
Total value |
39 u |
7 u |
|
46 u |
Number of painters = 1 u
Number of welders = 3 x 1 u = 3 u
Total amount paid
= (3 u x 13) + (1 u x 7)
= 39 u + 7 u
= 46 u
46 u = 138
1 u = 138 ÷ 46 = 3
Number of more welders than painters
= 3 u - 1 u
= 2 u
= 2 x 3
= 6
Answer(s): 6