Question
A flagpole stands on top of a building. From a point 50
meters away from the base of the building, the angle of elevation to the top of the building is 30°, and to the top of the flagpole is 45°. Find the height of the flagpole.Solution
Let the height of the building be h meters, and the height of the flagpole be f meters. From the angle of elevation to the top of the building (30°): tan 30° = h / 50 1/√3 = h / 50 h = 50 / √3. From the angle of elevation to the top of the flagpole (45°): tan 45° = (h + f) / 50  1 = (h + f) / 50  h + f = 50. Substitute h = 50 / √3: (50 / √3) + f = 50. f = 50 - (50 / √3). f = 50(1 - 1/√3). f = 50(√3 - 1) / √3. Answer: d
Which of the following statements is/are correct?
I. Only marketed goods are considered while estimating Gross Domestic Product (GDP).
In the famous Bagwal fair of Devidhura which among the following does not participate?
Dree Utsav is celebrated in the state of ____________.
The Marylebone Cricket Club (MCC) has declared and awarded two Indian cricketers, name them?
Which of the following states stands at number one in terms of route kilometers at the end of the year 2019-20 as per the Indian Railways Yearbook 2019-20?
What does ‘P’ denote in PRAN a unique number provided under PFRDA?
Which of the following statements is true about Pradhan Mantri Vaya Vandana Yojana (PMVVY)?
1. It is a pension plan for senior citizens
<...SIMBEX is a military exercise conducted between the defense forces of which of the following nations?
Which reform was initiated by Lord Ripon for the welfare of labourers?
Successive discount of a% and b% are equivalent to a discount of
