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Ex 9.1, 1 The shape of the top surface of a table is a trapezium. Find its area if its parallel sides are 1 m and 1.2 m and perpendicular distance between them is 0.8 m. Now, Given the top surface is in the shape of a trapezium Area of the top surface = Area of trapezium = 𝟏/𝟐 × (Sum of Parallel Sides) × Height Given, Length of Parallel sides is 1 am and 1.2 , ∴ a = 1 m & b = 1.2 m & Height = Perpendicular distance between Parallel sides h = 0.8 m Area = 𝟏/𝟐 (𝒂 + b) × h Area = 1/2 × (1 + 1.2) × 0.8 = 1/2 × 2.2 × 0.8 = 1/2 × 22/10 × 8/10 = (22 × 4)/100 = 𝟖𝟖/𝟏𝟎𝟎 = 0.88 m2 ∴ Area of top surface of table = 0.88 m2

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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