If $x = at + b{t^2}$, where $x$ is the distance travelled by the body in kilometres while $t$ is the time in seconds, then the units of $b$ are
If $x = at + b{t^2}$, where $x$ is the distance travelled by the body in kilometres while $t$ is the time in seconds, then the units of $b$ are
$km/s$
$km - s$
$km/{s^2}$
$km - {s^2}$
If $x = at + b{t^2}$, where $x$ is the distance travelled by the body in kilometres while $t$ is the time in seconds, then the units of $b$ are
$[x] = [b{t^2}] \Rightarrow [b] = [x/{t^2}] = km/{s^2}$
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