Ashifur August 8, 2023 - 08:17
Problem: প্রতি কেজি ধান ২০ ও প্রতি কেজি গম ৪০ । এক বছরে ধানের উৎপাদন কমে যায়। প্রতি দিন ধানের দাম প্রতিদিনের থেকে ১০% বাড়ে ও প্রতিদিন গমের দাম কমে প্রতিদিনে এর থেকে ৫% কমে ৷ কত দিন পড়ে ২ টা সমান হবে ও মূল্য কত হবে?

View all: KARMASHANAGS THAN BANK SENIOR ( OFFICER) | WRITTEN QUESTION (MATH) SOLVE | 2015

Correct Answer: ans: ৫ দিন পড়ে ২টা সমান হবে ও মূল্য ৩০ টাকা হবে।

Explanation:

Cost of rice increases per day by = 20 x 10% = 2 taka

Cost of wheat decreases per day by = 40 x 5% = 2 taka

মনেকরি, After x days, the price of rice and wheat will be equal.

=> 20+2x=40-(2$\times$x)

=20 + 2x = 40 – 2x

=> 4x = 20

x = 5

So after 5 days price of rice and wheat are same and at that time the amount = 20 + (2 x 5) = 30.

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