Ex 5.1, 25 - Chapter 6 Class 11 Linear Inequalities (Important Question)
Last updated at April 16, 2024 by Teachoo
Chapter 6 Class 11 Linear Inequalities
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Chapter 6 Class 11 Linear Inequalities
Last updated at April 16, 2024 by Teachoo
Ex 5.1, 25 The longest side of a triangle is 3 times the shortest side and the third side is 2 cm shorter than the longest side. If the perimeter of the triangle is at least 61 cm, find the minimum length of the shortest side. Let the length of the shortest side be x cm. So, length of longest side = 3 times shorter side = 3x & Length of the third side = (3x – 2) cm Now, Perimeter = Sum of three sides = x + 3x + (3x – 2) = x + 3x + 3x – 2 = 7x – 2 Given that, perimeter of the triangle is at least 61 cm, i.e. Perimeter ≥ 61 7x – 2 ≥ 61 7x ≥ 61 + 2 7x ≥ 63 𝑥 ≥ 63/7 x ≥ 9 ∴ Minimum value of x is 9 Thus, the minimum length of the shortest side is 9 cm.