A spherical balloon is pumped, at the constant rate of 3m3/min. The rate of increase of it's surface area at certain instant is found to be 5m2/min. At this instant it's radius is equal to:
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evaluate the density change of water. ..... The film contact area is A and its thickness h. .... P1.53 the cone surface and instantaneous rate ω, æ rω öæ dr ö d
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= — (1)
Surface area =
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