Answer
$a). 27.5m/s$
$b). 237.5m$
Work Step by Step
a). $v=u+at$
$v=20+(0.75\times10)=27.5m/s$
b). $S=ut+\frac{1}{2}at^{2}$
$S=(20\times10)+(0.5\times0.75\times100)=200+37.5=237.5m$
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