61.
There are 6 working days in a regular week and for each day, the working hours are 10. A man earns Rs. 2.10 per hour for regular work and Rs. 4.20 per hour for overtime. If he earns Rs. 525 in 4 weeks, how many hours did he work?
Answer: A
Regular working hours in 4 weeks
\(=4 \times 6 \times 10=240\) hours
Amount earned by working in these regular working hours
\(=240 \times 2.10= \text {Rs. } 504\)
Additional amount earned
\(=525-504=\text{Rs. }21\)
Hours he worked overtime
\(=\dfrac{21}{4.2}=\dfrac{210}{42}=5\) hours
Total hours he worked
\(=240+5=245\)
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