Ashifur August 8, 2023 - 14:33
Problem: ৩ খানা চেয়ার ও ৫ খানা টেবিলের দাম ৬২০০ টাকা । ৭ থানা চেয়ার ও ২ খানা টেবিলের দাম ৪৮০০টাকা হলে,চেয়ার ও টেবিলের দাম আলাদাভাবে নির্ণয় করুন ।

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

Correct Answer: উত্তরঃ ১টি টেবিলের দাম ১০০০ টাকা ও ১ টি চেয়ারের দাম ৪০০ টাকা ।

Explanation:

৩ খানা চেয়ার + ৫ খানা টেবিলের দাম = ৬২০০ টাকা………..( ১)

৭ খানা চেয়ার + ২ খানা টেবিলের দাম = ৪৮০০ টাকা …………(২)

সমীকরণ (১) নং কে ৭ দ্বারা এবং (২) নং কে ৩ দ্বারা গুণ করে সমীকরণ (১) হতে (২) বিয়োগ করে পাই,২১ খানা চেয়ার + ৩৫ খানা টেবিলের দাম =৪৩৪০০ টাকা

২১ খানা চেয়ার + ৬ খানা টেবিশের দাম ল ১৪৪০০ টাকা

২৯ খানা টেবিলের দাম =২৯০০০ টাকা

১ খানা টেবিলের দাম =$\frac{২৯০০০}{২৯}$=১০০০ টাকা

৫ খানা টেবিলের দাম = (১০০০x ৫)=৫০০০ টাকা

৫ খানা টেবিলের দাম (১) নং সমীকরনে বসিয়ে পাই,

৩ খানা চেয়ার +৫০০০ টাকা =৬২০০ টাকা

৩ খানা চেয়ার = (৬২০০ – ৫০০০) = ১২০০ টাকা

১ খানা চেয়ার =$\frac{১২০০০}{৩}$=৪০০ টাকা

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