A shopkeeper expects a gain of 22.5% on his cost price. If in a week, his sale was of Tk. 392, what was his profit ?

A Tk. 18.20
B Tk. 70
C Tk. 72
D Tk. 88.25

Correct Answer: Tk. 72

ধরি, ক্রয়মূল্য x টাকা x + x × 2.25/100 = 392 1.225x = 392 x = 392/1.225 = 392 ×1000 /1225 x = 320 লাভ = 392 - 320 = 72 টাকা
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