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FORM 4. CHAPTER 9
9.4 RATE OF CHANGE
PAGE 211 : PRACTICE 19
A container in the form of an inverted cone is being
filled with water at a rate of 8 cm3/s. The cone has a
radius of 20 cm and a height of 30 cm. Find the rate
of change of the height of the water level when the
water level is 5 cm.
LOCUS
Point P(x, y) moves in such a way that its distance from point Q(3,1) is always two times its perpendicular distance from the straight line x = -1 Find the equation of the locus of the moving point P
