Question

The motion of particle is described by the
equation x = a + bt2
, where a = 15 cm and b = 3
cm/sec2
. Its instant velocity at time 3 sec will be
(a) 36 cm/sec (b) 9 cm/sec
(c) 4.5 cm/sec (d) 18 cm/sec

Answer 1

Answer:

d has answer but it options was 18