A man's regular pay Tk. 30 per hour up to 40 hours. Overtime is twice the regular payment. If he was paid Tk. 1680, how many hours overtime did he work?

A 7
B 16
C 9
D 8

Correct Answer: 8

Total earning in 40 hours = 40*30 = 1200tkRemaining earning = 1680-1200 = 480tknumber of overtime hours = 480/(30*2)                                                  = 480/60                                                 = 8 hours (Ans)
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