CircleHard
Question
A spherical iron ball 10 cm in radius is coated with a layer of ice of uniform thickness than melts at a rate of 50 cm3/min. When the thickness of ice is 5 cm, then the rate at which the thickness of ice decreases, is
Options
A.
cm/min
cm/minB.
cm/min
cm/minC.
cm/min
cm/minD.
cm/min
cm/min
= 50
= 50 
where r = 15 
More Circle Questions
If the lines 2x + 3y + 1 = 0 and 3x - y - 4 = 0 lie along diameters of a circle of circumference 10π, then the equa...The plane x + 2y - z = 4 cuts the sphere x2 + y2 + z2 - x + z - 2 = 0 in a circle of radius...Tangents are drawn from origin O, to the circle x2 + y2 + 6x - 10y + λ = 0 to touch the circle at points A and B. I...Identify the correct statement(s) -...The locus of the centres of the circles such that the point (2, 3) is the mid point of the chord 5x + 2y = 16 is -...