Question
Two Poles are 12 metres apart horizontally and the
height of one is double that of the other. If from the mid-point of the line joining their feet, an observer finds the angular elevations of their tops to be complementary. Then the height of the shorter post is:Solution
Let AB = taller pole CD = shorter pole = h OB = OD =( 12)/2 = 6m In ∆OCD, tanθ = h/6 ............................(i) In ∆AOB tan (90- θ) = 2h/6 = h/3 cotθ= h/3 .............................(ii) Multiplying (i) and (ii), we get tanθ × cotθ = h/6 × 4/3 1 = h²/18 h² = 18 h=3√2 m
Which among the following is Photoblastic Seed?
In C4 plants, the primary carboxylation takes place by using ___ enzyme
Which type of sugar is most commonly transported during phloem translocation?
Cell is the basic building block of life . Cell theory was put forward by?
Brassica carrinata is a cross between
Agricultural census is conducted by Ministry of Agriculture and Farmers’ Welfare in every ___ year with participation of states and UTs since 1970 as ...
What is the primary role of abscisic acid (ABA) in stomatal movement?
Which process share the same pathway as glycolysis but in opposite direction?
Highest water use efficiency is of
Which of the following plant hormones is responsible for delaying leaf senescence and is known as the "anti-aging hormone"?
Relevant for Exams:
