Given :
A boat is travelling 5 m/s and accelerates at a rate of 3 m/s² .
u = 5 m/s.
a = 3 m/s².
To Find :
How long will it take for the boat to reach a velocity of 20 m/s.
Solution :
Final velocity is v =20 m/s.
By equation of motion :
[tex]v=u+at[/tex]
Putting all given values :
[tex]20 = 5 + 3t\\\\t = 5 \ s[/tex]
Therefore, time taken to reach 20 m/s is 5 seconds.
Hence, this is the required solution.