A painter charges Rs. 225 for materials and Rs. W per hour for labour. The total cost of painting an office is Rs. 330. How many hours did it take the painter to paint the office?
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Answer:
The time taken by the painter is 3 hours .
Given data -
material cost = 225
labour cost = 35/hour
total cost = 330
so the total labour cost = 330-225=105
now
35 is required for =1hr
1 is required for = 1/35 hr
105 is required for 105/35 = 3 hrs
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