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1. $\frac{৯}{১ ০} = \frac{২ ৭}{ক}$

A. $১ ০$
B. $১ ০$
C. $১ ০$
D. $১ ০$

Answer: Option B

Explanation:

(৯/১০) = (২৭/ক)

বা, ৯ক = (১০×২৭)

বা, ক = (১০×২৭)/৯

∴ ক = ৩০

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