Question
A pole got broken by the wind whose top meets the ground
at an angle of 30° at a distance of 45 meters from the foot. What was the total height of the pole?Solution
The broken point of the pole is A and point C is a point where the pole meets at the ground. Total length of the pole = BA + AC BC = 45 tan30° = AB/BC ⇒ 1/√3 = AB/45 ⇒ AB = 45/√3 ⇒ AB = 15√3 Again, cos30° = BC/AC ⇒ √ 3/2 = 45/AC ∴ Total he ight of pole = 15√3 + 30√3 = 45√3 m
Lichens, the pioneer organisms that initiate ecological succession are actually a symbiotic association of
Which one of the following is variety of triticale
‘The law of limiting factors’ was proposed by
In rust cycle, wheat is infected by which of the following spores?
Winter wheat is grown in
Movement of leaves of sensitive plant, Mimosa pudica are due to
Damping off and leaf blights are very effectively checked by
Seed plot technique of potato is used to produce
Breeder is having tag color of
Application developed by Indian institute of wheat and barley research for pest management in wheat crop is
Relevant for Exams:
