The distance travelled by the bike can be calculated by using the basic relationship between speed (v), distance (S) and time (t):
[tex] v=\frac{S}{t} [/tex]
Rearranging the equation, we get
[tex] S=vt [/tex]
The speed of the bike is v=3 m/s, the time is t=30 s, so the distance travelled by the bike is
[tex] S=vt=(3 m/s)(30 s)=90 m [/tex]