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NCERT Solutions for Class 9 Mathematics Chapter 15 Probability
  • NCERT Solution For Class 9 Mathematics

    Probability Here is the CBSE Mathematics Chapter 15 for Class 9 students. Summary and detailed explanation of the lesson, including the definitions of difficult words. All of the exercises and questions and answers from the lesson's back end have been completed. NCERT Solutions for Class 9 Mathematics Probability Chapter 15 NCERT Solutions for Class 9 Mathematics Probability Chapter 15 The following is a summary in Hindi and English for the academic year 2023-24. You can save these solutions to your computer or use the Class 9 Mathematics.

    Question 1
    CBSEENMA9003366

    A plastic box 1.5 m long, 1.25 m wide and 65 cm deep is to be made. It is opened at the top. Ignoring the thickness of the plastic sheet, determine:

    (i) The area of the sheet required for making the box.
    (ii) The cost of sheet for it, if a sheet measuring 1 m2 costsर 20.

    Solution

    (i) l = 1.5 m
    b= 1.25 m
    h = 65 cm = 0.65 m.
    ∴ The area of the sheet required for making the box = lb + 2(bh + hl)
    = (1.5)(1.25) + 2 {(1.25)(0.65) + (0.65)(1.5)} = 1.875 + 2{0.8125 + 0.975}
    = 1.875 + 2(1.7875) = 1.875 + 3.575 = 5.45 m2.
    (ii) The cost of sheet for it = र 5.45 x 20 = र 109.