SOLUTION: A plumber charges Php150 per hour for his labor and Php120 per hour for his assistant. On a repair job the bill was Php3440 with Php2460 for labor and Php980 for parts. If the assi
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Question 805787: A plumber charges Php150 per hour for his labor and Php120 per hour for his assistant. On a repair job the bill was Php3440 with Php2460 for labor and Php980 for parts. If the assistant worked for two hours less than the plumber, how many hours did each work?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
A plumber charges Php150 per hour for his labor and Php120 per hour for his assistant. On a repair job the bill was Php3440 with Php2460 for labor and Php980 for parts. If the assistant worked for two hours less than the plumber, how many hours did each work?
Total bill = 3440
parts = 980
labor bill = 2460
Carpenter --------------150----------------x hours
assistant -------------120---------------(x-2) hours
labor bill = cost of plumber + cost of assistant
150x+120(x-2)=2460
150x+120x-240=2460
270x=2700
/270
x= 10 hours ----------carpenter
assistant ---------8 hours
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