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CBSE Class 10 Sample Paper for 2021 Boards - Maths Basic

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Question 20 (Case Based Question) - CBSE Class 10 Sample Paper for 2021 Boards - Maths Basic - Solutions of Sample Papers for Class 10 Boards

Last updated at Aug. 21, 2021 by

Due to heavy storm an electric wire got bent as shown in the figure. It followed a mathematical shape. Answer the following questions below.

Note: Check more Case Based Questions for Polynomials Class 10

 

 

Due to heavy storm an electric wire got bent as shown in the figure

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Question 20 - CBSE Class 10 Sample Paper for 2021 Boards - Maths Basic - Part 2

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Question 20 - CBSE Class 10 Sample Paper for 2021 Boards - Maths Basic - Part 3

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Question 20 - CBSE Class 10 Sample Paper for 2021 Boards - Maths Basic - Part 4

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Question 20 - CBSE Class 10 Sample Paper for 2021 Boards - Maths Basic - Part 5

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Question 20 - CBSE Class 10 Sample Paper for 2021 Boards - Maths Basic - Part 6

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Note: Check more Case Based Questions for Polynomials Class 10

Transcript

Question 20 Due to heavy storm an electric wire got bent as shown in the figure. It followed a mathematical shape. Answer the following questions below.Question 20 (i) Name the shape in which the wire is bent (a) Spiral (b) ellipse (c) linear (d) ParabolaParabola 1 marks Question 20 (ii) How many zeroes are there for the polynomial (shape of the wire) (a) 2 (b) 3 (d) 1 (d) 0Since polynomial hits the x-axis at 2 points ∴ Number of zeros = 2 1 marks Question 20 (iii) The zeroes of the polynomial are (a) –1, 5 (b) –1, 3 (c) 3, 5 (d) –4, 2Zero of polynomial would be where curve touches the x-axis ∴ Zeroes are −1 and 3 1 marks Question 20 (iv) What will be the expression of the polynomial? (a) x2 + 2x – 3 (b) x2 – 2x +3 (c) x2 – 2x – 3 (d) x2 + 2x + 3Since Zeroes are −1 and 3 Polynomial = (x − (−1)) (x − 3) = (x + 1) (x − 3) = x (x − 3) + 1 (x − 3) = x2 − 3x + x − 3 = x2 − 2x − 3 1 marks Question 20 (v) What is the value of the polynomial if x = –1? (a) 6 (b) –18 (c) 18 (d) 0At x = −1 Value of Polynomial is 0 1 marks

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.