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Let AB bee the height of the building. In ∆ACD and ∆ABC ∠ACB = ∠CAD + ∠CDA 60° = ∠CAD + 30° ∠CAD = 30° So, AC = CD AC = 40 m cosec 60° = AC/AB 2/√3 = 40/AB AB = 20√3
Which of the following is an example of mutualism?
Which of the following is the correct set-up for electrolytic refining of silver?
The force which opposes the relative motion between different layers of liquid or gases is called –
Which of the following element is found in maximum percentage in the human body?
Which one among the following fuels is used in gas welding?
Which one of the following diseases in humans can spread through air?
Which of the following does not show heterotrophic nutrition?
Match the following:
Lux is the SI unit of -
A potentiometer wire of length 1 m has a resistance of 5 Ω. It is connected to a 6 V battery in series with a resistance of 10 Ω. Determine the emf ...