SOLUTION: There are six working days in a normal working week. Each day a worker is expected to work for 9 hours. A man gets Rs. 6 per hour for regular work and Rs. 9 per hour for overtime.

Question 870077: There are six working days in a normal working week. Each day a worker is expected to work for 9 hours. A man gets Rs. 6 per hour for regular work and Rs. 9 per hour for overtime. If he earns Rs. 1800 in 5 weeks, then how many extra hours did he work during those 5 weeks?
A. 30
B. 22
C. 21
D. 20

Answer by Theo(13342) (Show Source): You can put this solution on YOUR website!
9 hours per day for 6 days is equal to 54 hours.
54 hours * 5 weeks is equal to 270 hours.
6 * 270 hours = 1620.
1800 - 1620 = 180.
180 / 9 = 20 hours of overtime.

the worker worked 20 hours overtime.
normal hours for 5 weeks is equal to 9 * 6 * 5 = 270 hours.

270 hours * 6 per hour normal pay = 1620
20 * 9 per hour overtime pay = 180
1620 + 180 = 1800

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