Answer:
Here,
change in velocity in 10 seconds \[=\text{12}+\text{12}=\text{144
km}/\text{h}=\text{4}0\text{ m}{{\text{s}}^{-\text{1}}}\]
Acceleration,\[\text{a}=\text{
4}0/\text{1}0=\text{4m}{{\text{s}}^{-\text{2}}}\].
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