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

Sample paper Maths Class 10 - 2023 Boards - Standard.jpg

 


Transcript

Question 38 (iii) What is the speed of the plane in km/hr. If Distance BC is found Speed of airplane = (𝐷𝑖𝑠𝑡𝑎𝑛𝑐𝑒 𝑡𝑟𝑎𝑣𝑒𝑙𝑙𝑒𝑑 𝑖𝑛 30 𝑠𝑒𝑐𝑜𝑛𝑑𝑠)/(30 𝑠𝑒𝑐𝑜𝑛𝑑𝑠) = 6000/30 m/s = 200 m/s = 200 × (1 𝑚𝑒𝑡𝑒𝑟)/(1 𝑠𝑒𝑐𝑜𝑛𝑑) = 200 × (𝟏/𝟏𝟎𝟎𝟎 𝒌𝒎)/(𝟏/𝟑𝟔𝟎𝟎 𝒉𝒐𝒖𝒓𝒔) = 200 × 1/1000 ×3600/1 km/hr = 720 km/hr If Distance BY is found Speed of airplane = (𝐷𝑖𝑠𝑡𝑎𝑛𝑐𝑒 𝑡𝑟𝑎𝑣𝑒𝑙𝑙𝑒𝑑 𝑖𝑛 15(√3−1) 𝑠𝑒𝑐𝑜𝑛𝑑𝑠)/(15(√3−1) 𝑠𝑒𝑐𝑜𝑛𝑑𝑠) = (3000(√3 − 1))/(15(√3 − 1)) m/s = 200 m/s = 200 × (1 𝑚𝑒𝑡𝑒𝑟)/(1 𝑠𝑒𝑐𝑜𝑛𝑑) = 200 × (𝟏/𝟏𝟎𝟎𝟎 𝒌𝒎)/(𝟏/𝟑𝟔𝟎𝟎 𝒉𝒐𝒖𝒓𝒔) = 200 × 1/1000 ×3600/1 km/hr = 720 km/hr

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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.