Let, the height of the post = AB = ‘h’ m From ΔACB, ∠ACB = 30° [∵ given] tan ∠ACB = perpendicular/base ⇒ tan 30° = AB/BC ⇒ 1/√3 = h/BC ⇒ BC = h√3 ... (1) From ΔADB, ∠ADB = 60° [∵ given] tan ∠ADB = perpendicular/base ⇒ tan 60° = AB/BD ⇒ √3 = h/BD ⇒ BD = h/√3 ... (2) According to the question: BC - BD = 5 ⇒ h√3 - h/√3 = 5 ⇒ 2h/√3 = 5 ⇒ h = (5√3)/2 m
According to the 2011 Census, the population of India has registered
Which of the following seas has highest salinity in the world?
What is the next number 2, 9, 28, 65, __________.
The average of 10 numbers is 30. What will be the new average if one of the numbers is increased by 30 and five of the rest decreased by 4 each?
A ray of light hits a mirror and is reflected. If the mirror rotates by an angle 10° in one direction, then the reflected ray will rotate by
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The next figure is
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1. The Arctic Circle is connected with the Pacific Ocean by a narrow stretch of shallow water kno...
Inland water transport does not take place in the rivers of
LEED Rating pertains to
