Question

please solve this question ✌​

Answer 1

Answer:

assume balloon is a sphere

differentiating the formula of volume of sphere:

d(v)/dr = d{(4÷3)/πr^3}

=4πr^2

=4π2^2

=16π sq units

Answer 2

Answer:

$the \: volume \: of \: spherical \: ballon \: is \: \\ v = \frac{4}{3} \pi {r}^{3} \\ or \: \frac{dv}{dr} = \frac{4}{3} \pi. \: 3 {r}^{2} = 4\pi {r}^{2} \\ when \: r = 2 \\ \frac{dv}{dr} = 4\pi {(2)}^{2 } = 16\pi \\ < ans \: >$