Discussion
In a regular week, there are 5 working days and for each day, the working hours are 8. A man gets Rs. 2.40 per hour for regular work and Rs. 3.20 per hours for overtime. If he earns Rs. 432 in 4 weeks, then how many hours does he work for ?
Answer: B
He works 175 hours.
Regular hours in 4 weeks are 4 × 5 × 8 = 160. The earnings separate into regular pay and overtime:
\[ \begin{aligned} 160 \times 2.40 &= 384 \\ 432 - 384 &= 48 \\ 48 \div 3.20 &= 15 \text{ overtime hours} \end{aligned} \]
So he works 160 + 15 = 175 hours. 160 counts only the regular hours, and 180 and 195 would mean more overtime than Rs. 48 pays for.
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