Ashifur August 8, 2023 - 14:58
Problem: চালের দাম $১২\frac{১}{২}$ % কমে গেলে, একই খরচে চাল কেনা শতকরা কি পরিমাপ বৃদ্ধি করা যাবে?

View all: BANGLADESH BANK BANKERS(AD) | WRITTEN QUESTION (MATH) SOLVE | 1990

Correct Answer: উত্তরঃ চালে কেনা বৃদ্ধি করা যায় $১৪\frac{২}{৭}$%

Explanation:

চালের দাম=$১২\frac{১}{2}$বা$\frac{২৫}{২}$ % কমে গেলে অর্থাৎ

পূর্ব দাম ১০০ টাকা হলে বর্তমান দাম =$১০০\frac{২৫){২} $=$\frac{১৭৫}{২}$ টাকা

বর্তমান দাম $\frac{১৭৫}{২}$ টাকা হলে পূর্বের দাম = ১০০ টাকাবর্তমান দাম ১০০ টাকা হলে পূর্বের দাম =$\frac{১০০\times ২\times ১০০}{১৭৫}$=$\frac{৮০০}{৭}$ টাকা

চাল কেনা বৃদ্ধি করা যায়=(\frac{৮০০}{৭}-১০০)= $\frac{১০০}{৭}$টাকা

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