An employee’s wages is Rs.30/hour upto 40 hours. Overtime is twice the regular wages. If he was paid Rs. 1680, how many hours overtime did he work?

48 hours

8 hours

16 hours

None of these

Let's calculate:

Regular wages for 40 hours = 40 * Rs. 30 = Rs. 1200

Total wages received = Rs. 1680

Overtime wages = Rs. 1680 - Rs. 1200 = Rs. 480

Overtime wage rate = 2 * Rs. 30 = Rs. 60/hour

Number of overtime hours = Overtime wages / Overtime wage rate

= Rs. 480 / Rs. 60

= 8 hours