Question 1072317
I'm assuming the acceleration units are {{{km/hr^2}}}.
Convert 20 seconds to hours,
{{{t=20/3600=2/360=1/180}}}
So,
{{{v[F]=v[I]+at}}}
{{{v[F]=40+(3)(1/180)}}}
{{{v[F]=7200/180+3/180}}}
{{{v[F]=7203/180}}}
{{{v[F]=2401/60}}}{{{kph}}}