Salam earns Tk. 8.50 per hour on days other than Friday and twice the rate on Friday. Last week he worked a total of 50 hours including 8 hours on Friday. What is his earning for the week?

A Tk. 340
B Tk. 398
C Tk. 408
D Tk. 493

Correct Answer: Tk. 493

During the week, Salam worked a total of 50 - 8 = 42 hours at a rate of Tk. 8.50 per hour.On Friday, he worked 8 hours at a rate of Tk. 8.50 × 2 = Tk. 17.00 per hour.Total earnings for the week = 42 × 8.50 + 8 × 17 = TK. 493
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