Question
A vertical pole and a vertical tower are standing on the
same level ground. Height of the pole is 15 metres . From the top of the pole the angle of elevation of the top of the tower and angle of depression of the foot of the tower are 60° and 30° respectively. The height of the tower is:Solution
AB = Pole CE = Tower AB = 15 m In ∆ABE tan30° = AB/BE 1/√3 = AB/BE 1/√3 = 15/BE BE = 15√3 m AD = BE = 15√3 In ∆ACD tan60° = CD/AD ⇒ √3 = CD/(15√3) ⇒ CD = 45 CD + DE = 45 + 15 ⇒ 60 m
Which is an illustration of relay cropping?
In the first stage of the classical production function, the elasticity of production is typically:
Jaya, a high yielding variety developed in India which outyield both its parent was a cross between _____
Bud scales (cataphylls) are_____ designed for protecting buds (apical or axillary).
Which of the following is considered as power house of the cell?Â
Conversion of organic form of nitrogen into inorganic form is refer to as………………..
The headquarters of National Bureau of Plant Genetic Resources is located in:
Irradiation is also known as...................?
Which of the following best defines a biome?
The transpiration driven ascent of xylem sap depends mainly on _____