An icecream cone has a height of 12cm and a radius of 4cm. It is being filled with soft-serve ice-cream at a rate of 0.4cm3s1. How quickly is the height of the ice-cream in the cone increasing when it is 2cm deep? Select one: 32л cms 45 -1 9 cms-1 107 27 cms-1 10n 8л cms-1 135

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