A spherical baloon is being filled at a rate of cm /s. At what rate is the surface area expanding when the radius is cm? V = 4/3*Pi*r^3 V`=4*Pi*r^2*r` r`= V`/(4Pi*r^2) V` = 10, r = 11 r` = 5/(242*Pi) cm/s Is this correct???
Follow Math Help Forum on Facebook and Google+
we have been asked to find the rate at which the surface area is expanding.
No. The question is to calculate the rate of change of the surface at R = 11 cm3.
Last edited by votan; September 21st 2013 at 09:36 PM. Reason: chnge data
thx guys
View Tag Cloud