click

Some Solutions Form 4

















































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