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Question 48 (Case Based Question) - CBSE Class 12 Sample Paper for 2022 Boards (MCQ Based - for Term 1) - Solutions of Sample Papers and Past Year Papers - for Class 12 Boards

Last updated at Dec. 16, 2024 by Teachoo

The most economical speed to run the train is:

(a) 18 km/h   (b)5 km/h  (c) 80 km/h        (d) 40 km/h 

 

Transcript

Question 48 The most economical speed to run the train is: (a) 18 km/h (b)5 km/h (c) 80 km/h (d) 40 km/h We need to find minimise Cost Now, Cost = C(v) = šŸ‘šŸ•šŸ“/šŸ’ š’— + šŸ”šŸŽšŸŽšŸŽšŸŽšŸŽ/š’— Differentiating w.r.t v Cā€™(v) = šŸ‘šŸ•šŸ“/šŸ’ āˆ’ šŸ”šŸŽšŸŽšŸŽšŸŽšŸŽ/š’—^šŸ Putting Cā€™(v) = 0 0 = 375/4 āˆ’ 600000/š‘£^2 600000/š‘£^2 = 375/4 600000 Ɨ4/375 = š‘£^2 600000 Ɨ4/375 = š‘£^2 1600 Ɨ 4 = š’—^šŸ 40 Ɨ 2 = š’— 80 = š’— š’— = 80 km/hr So, the correct answer is (c)
  1. Class 12
  2. Solutions of Sample Papers and Past Year Papers - for Class 12 Boards

    3. CBSE Class 12 Sample Paper for 2022 Boards (MCQ Based - for Term 1)

    CBSE Class 12 Sample Paper for 2021 Boards →
CBSE Class 12 Sample Paper for 2021 Boards →
Class 12
Solutions of Sample Papers and Past Year Papers - for Class 12 Boards

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo