Question

The motion of a particle is described by the equation X= at+bt2 where a= 15 cm S-1 and b = 3 cm S-2, Its instantaneous velocity at t= 3 sec will be

a) 33 cm S-1
(b) 18 cm S-1
(c) 16 cm S-1
(d) 32 cm S-2 ​

Answer 1

$\rule{ \120pt}{1pt}$

$\implies \boxed{ \color{red}{33 \: \frac{cm}{s} }}$

Answer 2

Answer:

a. 33

Explanation: