Application of DerivativeHard
Question
The lower corner of a leaf in a book is folded over so as to just reach the inner edge of the page. The fraction of width folded over if the area of the folded part is minimum is:
Options
A.5/8
B.2/3
C.3/4
D.4/5
Solution
cos(π - 2θ) =
Area =
x.xtan θ = 
Minimum area when tan θ =
⇒ x = 
Create a free account to view solution
View Solution FreeMore Application of Derivative Questions
The area of triangle formed by tangent to the hyperbola 2xy = a2 and coordinates axes is-...The tangent to the curve x = a(θ − sinθ ), y = a(1 + cosθ) at the points = (2k + 1)π, k∈...a, b, c are three distinct real numbers, which are in G.P. and a + b + c = xb, then -...The distance of normal from origin at any point θ to the curve x = a (cosθ + sinθ), y = a (sinθ W...In a regular triangular prism the distance from the centre of one base to one of the vertices of the other base is l. Th...