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 ?
160
175
180
195
Explanation:
Suppose the man works overtime for $ x $ hours.
Now, working hours in 4 weeks = $\left(5 \times 8 \times 4\right)$ = 160.
$\therefore$ 160 x 2.40 + $ x $ x 3.20 = 432
$\Rightarrow$ 3.20$ x $ = $\left(432 - 384\right)$ = 48
$\Rightarrow x $ = 15.
Hence, total hours of work = $\left(160 + 15\right)$ = 175.