AIEEE Exam

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??

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AIEEE Other Question

The line parallel to the x-axis and passing through the intersection of the lines ax+2by+3b=0 and bx-2ay-3a=0, where (a, b) and (0, 0) is
option
(1) below the x-axis at a distance of 3/2 from it
(2) below the x-axis at a distance of 2/3 from it
(3) above the x-axis at a distance of 3/2 from it
(4) above the x-axis at a distance of 2/3 from it The angle between the lines 2x = 3y = -z and 6x = -y = -4z is
option
a) 0
b) 15
c) 30
d) 45