A metallic disc is being heated. Its area (in `m^(2)`) at any time t (in sec) is given by `A=5t^(2)+4t`. Calculate the rate of increase in area at `t=3sec`.

A metallic disc is being heated. Its area A(in m^2 ) at any time t(in second) is given by A=5t^2+4t+8 . Calculate the rate of increase in area at t=3s .

A metallic disc is being heated. Its area A(in m^2 ) at any time t(in second) is given by A=5t^2+4t+8 . Calculate the rate of increase in area at t=3s .

A metallic disc is being heated. Its area A ("in" m^2) at any time t ("in" sec) is given by A =5 t^2 +4 t+8 Calculate the rate of increase of area at t =3 s .

The area of a blot of ink is growing such that after t seconds, its area is given by A = (3t^(2) +7) cm^(2) . Calculate the rate of increase of area at t=5 second.

The area of blot of link is growing such that after t seconds, its area is given by A =(3t^(2)+7) cm^(2) . Calculate the rate of increases of area at t=5 second.

The area of a blot of ink is growing such that after t seconds, its area is given by A = (3t^(2) +7) cm^(2) . Calculate the rate of increase of area at t=5 second.

The area of blot of link is growing such that after t seconds, its area is given by A =(3t^(2)+7) cm^(2) . Calculate the rate of increases of area at t=5 second.

The area of a blot of ink is growing such that after t seconds, its area is given by A = (3t^(2) +7) cm^(2) . Calculate the rate of increase of area at t=5 second.

The area of a blot of inkk is growing such that after t second , its area is given by A=(3t^2 +7)cm^2 . Calculate the rate of increase of area at t = 5seconds.

The area of a circle is given by A=pir^(2) , where r is the radius . Calculate the rate of increases of area w.r.t. radius.