Post a New Question

Calc

posted by on .

Air is being pumped into a spherical balloon so that its volume increases at a rate of 90{cm}^3/s. How fast is the surface area of the balloon increasing when its radius is 7{cm}? Recall that a ball of radius r has volume \displaystyle V={4}/{3}pie r^3 and surface area S=4\pi r^2

  • Calc - ,

    dV/dt= 4/3 PI 3 r^2 dr/dt
    solve for dr/dt given dv/dt

    Then dS/dt=4PI 2r dr/dt, knowing dr/dt solve for dS/dt

    and it is done.

  • Calc - ,

    ok thanks alot for clearing it up

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question