The tangent and normal to the ellipse 3x2 + 5y2 = 32 at the point P(2, 2) meet the x-axis at Q and R, respectively .Then the area (in sq. units) of the triangle PQR is :
A spherical iron ball of radius 10cm is coated with a layer of ice of uniform thickness that melts a rate of 50cm3/min When the thickness of the ice 5cm, then the rate at which the thickness (in cm/min) of the ice decreases, is :
The area (in sq.units ) of the region bounded by the curves y = 2x and ,in the first quadrant is:
If the plane 2x - y + 2z = 3 = 0 has the distances units from the planes 4x - 2y + 4z + = 0 and 2x - y + 2z + , respectively then the maximum value of
5
15
9
13