A car owner buys petrol at Tk. 75, Tk. 80 and Tk. 85 per liter for three successive years. What approximately is the average cost per liter of petrol if he spends Tk. 40,000 each year in this concern? (Average)

Shohan

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2025-01-04 04:42

1 Answers

Shohan

প্রশ্নে বলা হয়েছে যে, একজন গাড়ীর মালিক পরপর তিন বছরে 75 টাকা, 80 টাকা ও 85 টাকা দিয়ে পেট্রোল কিনল। সে যদি প্রতি বছর পেট্রোল বাবদ 40,000 টাকা ব্যয় করে, তবে গড়ে লিটার প্রতি প্রায় কত খরচ হয়েছিল?

Amount of petrol used in 3 years $= (\frac{40000}{75} + \frac{40000}{80} + \frac{40000}{85}) L i t e r$

$= 40, 000 (\frac{1}{75} + \frac{1}{80} + \frac{1}{85}) L i t e r = 40, 000 \times \frac{1}{5} (\frac{1}{15} + \frac{1}{16} + \frac{1}{17}) L i t e r = 8, 000 (\frac{1}{15} + \frac{1}{16} + \frac{1}{17}) L i t e r = 8, 000 \frac{272 + 255 + 240}{4080} L i t e r = 8, 000 \times \frac{767}{4080} L i t e r = \frac{76700}{51} L i t e r T o t a l \cos t = 3 \times 40, 000 = 120, 000 T a k a ∴ A v e r a g e \cos t = \frac{120000 \times 51}{76700} = 79.79 T a k a (A p p r o x i m a t e l y)$

5 views Answered 2024-12-14 13:31

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