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Ex 9.2, 3 Find the side of a cube whose surface area is 600 〖𝑐𝑚〗^2.Given, Surface area of cube = 600 〖𝑐𝑚〗^2 Let Side of cube = 𝒙 cm Thus, Surface area = 6 × (Side)2 600 = 6 × 𝒙^𝟐 600/6 = 𝑥^2 100 = 𝑥^2 𝑥^2 = 100 𝑥 = √100 𝑥 = √(10^2 ) 𝒙 = 𝟏𝟎 𝒄𝒎 ∴ Side of cube = 10 cm

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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, Social Science, Physics, Chemistry, Computer Science at Teachoo.