Ashifur August 8, 2023 - 14:33
Problem: ২ জন পুরুষ বা ৩ জন বালক যে কাজ ১২ দিনে সম্পন্ন করতে পারে, ২ জন পুরুষ এবং ১ জন বালক একত্রে এর দ্বিগুণ কাজ কৃত দিনে শেষ করতে পারবে?

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

Correct Answer: উত্তরঃ ১৮ দিনে শেষ করতে পারবে ।

Explanation:

দেয়া আছে, ২ জন পুরুষ = ৩ জন বালক

২ জন পুরুষ ও ১ জন বালক = (৩ + ১) = 8 জন বালক

৩ জন বালক ১ গুণ কাজ করে = ১২ দিনে

৪ জন বালক ২ গুণ কাজ করে =$\frac{১২\times ৩\times ২}{৪}$ =১৮ দিনে

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