Question
The length of the shadow of a vertical tower increases
by 9 m on horizontal ground when the height of the sun changes from 45° to 30 ° , then find the height of the tower?Solution
AB = 9 m DC = h, BC = x In ∆BCD tan 45 ° = DC/BC = h/x 1 = h/x x = h In ∆ACD tan 30° = DC/AC = DC/(AB + BC) 1/ √3 = h/(9 + x) 1/ √3 = h/(9 + h) 9 + h = √3 h √3 h - h = 9 h ( √3 - 1 ) = 9 h = 9/( √3 - 1) x ( √3 + 1)/ ( √3 + 1) = 9( √3 + 1)/2
What is the main focus of the Subhadra Yojana launched by PM Modi in Odisha?
What was the theme of the 'Shramdaan' organized by the Ministry of MSME as part of the national call for 'Ek Tareekh Ek Ghanta Ek Saath'?
According to the information provided by the Labour Bureau,the year-on-year inflation for the month stood at _____ compared to 6.16 per cent for the pre...
According to the RBI’s Quarterly BSR-1 report, what was the y-o-y growth rate of bank credit in September 2024?
What is the main objective of Delhi's draft 'Motor Vehicle Aggregator Scheme 2023'?
Which of the following statements is true regarding the MoU signed between the National Highway Authority of India and Nagarjunasagar - Srisailam Tiger...
Which of the following locations is NOT proposed for establishing a new Joint Logistics Node (JLN)?
Within the services sector for April–June 2025, which segment recorded the highest growth rate?
Nehru Memorial Museum and Library has been renamed as?
The term 'Digital Single Market Strategy' seen in the news refers to