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Question 38 (iii) - CBSE Class 10 Sample Paper for 2023 Boards - Maths Standard - Solutions of Sample Papers for Class 10 Boards

Last updated at April 16, 2024 by

What is the speed of the plane in km/hr.

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Transcript

Question 38 (iii) What is the speed of the plane in km/hr. If Distance BC is found Speed of airplane = (π·π‘–π‘ π‘‘π‘Žπ‘›π‘π‘’ π‘‘π‘Ÿπ‘Žπ‘£π‘’π‘™π‘™π‘’π‘‘ 𝑖𝑛 30 π‘ π‘’π‘π‘œπ‘›π‘‘π‘ )/(30 π‘ π‘’π‘π‘œπ‘›π‘‘π‘ ) = 6000/30 m/s = 200 m/s = 200 Γ— (1 π‘šπ‘’π‘‘π‘’π‘Ÿ)/(1 π‘ π‘’π‘π‘œπ‘›π‘‘) = 200 Γ— (𝟏/𝟏𝟎𝟎𝟎 π’Œπ’Ž)/(𝟏/πŸ‘πŸ”πŸŽπŸŽ 𝒉𝒐𝒖𝒓𝒔) = 200 Γ— 1/1000 Γ—3600/1 km/hr = 720 km/hr If Distance BY is found Speed of airplane = (π·π‘–π‘ π‘‘π‘Žπ‘›π‘π‘’ π‘‘π‘Ÿπ‘Žπ‘£π‘’π‘™π‘™π‘’π‘‘ 𝑖𝑛 15(√3βˆ’1) π‘ π‘’π‘π‘œπ‘›π‘‘π‘ )/(15(√3βˆ’1) π‘ π‘’π‘π‘œπ‘›π‘‘π‘ ) = (3000(√3 βˆ’ 1))/(15(√3 βˆ’ 1)) m/s = 200 m/s = 200 Γ— (1 π‘šπ‘’π‘‘π‘’π‘Ÿ)/(1 π‘ π‘’π‘π‘œπ‘›π‘‘) = 200 Γ— (𝟏/𝟏𝟎𝟎𝟎 π’Œπ’Ž)/(𝟏/πŸ‘πŸ”πŸŽπŸŽ 𝒉𝒐𝒖𝒓𝒔) = 200 Γ— 1/1000 Γ—3600/1 km/hr = 720 km/hr

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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.