HSC Arts (English Medium) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions

A wire of length 120 cm is bent in the form of a rectangle. Find its dimensions if the area of the rectangle is maximum

A rectangular sheet of paper has it area 24 sq. Meters. The margin at the top and the bottom are 75 cm each and the sides 50 cm each. What are the dimensions of the paper if the area of the printed space is maximum?

The negation of p ^ (q → r) is ______.

The maximum value of the function f(x) = `logx/x` is ______.

Find two numbers whose sum is 15 and when the square of one number multiplied by the cube of the other is maximum.

If x = f(t) and y = g(t) are differentiable functions of t, then prove that:

`dy/dx = ((dy//dt))/((dx//dt))`, if `dx/dt ≠ 0`

Hence, find `dy/dx` if x = a cot θ, y = b cosec θ.

Find the derivative of 7^x w.r.t.x⁷

Suppose y = f(x) is differentiable function of x and y is one-one onto, `dy/dx ≠ 0`. Also, if x = f^–1(y) is differentiable, then prove that `dx/dy = 1/((dy/dx))`, where `dy/dx ≠ 0`

Hence, find `d/dx(tan^-1x)`.

Find the maximum and the minimum values of the function f(x) = x²e^x.

If the points (1, 1, λ) and (–3, 0, 1) are equidistant from the plane `barr*(3hati + 4hatj - 12hatk) + 13` = 0, find the value of λ.

The negation of (p → q) ∧ r is ______.

A right circular cylinder is to be made so that the sum of the radius and height is 6 metres. Find the maximum volume of the cylinder.

Find the equations of the planes parallel to the plane x – 2y + 2z – 4 = 0 which is a unit distance from the point (1, 2, 3).

If x + y = 8, then the maximum value of x²y is ______.

Divide the number 100 into two parts so that the sum of their squares is minimum.

Find the point on the curve y² = 4x, which is nearest to the point (2, 1).

If x = f(t) and y = g(t) are differentiable functions of t, so that y is function of x and `(dx)/dt ≠ 0` then prove that `dy/(dx) = (dy/dt)/((dx)/dt)`. Hence find `dy/(dx)`, if x = at², y = 2at.

A box with a square base is to have an open top. The surface area of box is 147 sq. cm. What should be its dimensions in order that the volume is largest?

Write converse, inverse and contrapositive of the following statement.

If x < y then x² < y² (x, y ∈ R)

Write converse, inverse and contrapositive of the following statement.

A family becomes literate if the woman in it is literate.