Question

the radius r (in m) of disc is increasing with time t (in second) as r = 3t^2 +2t +6. Then rate of increasing of radius at time t =1 s is​

Answer 1

Answer:

11 m/s

Explanation:

that's given

t=1s

so,

First if all, we put t in

r=3t^2+2t+6

=3(1)^2+2(1)+6

=3(1)+2+6

=3+2+6

=11 m/s. ANSWER

That's proven,

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