Question 225929
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Remember{{{system(S[1]=original,S[2]=final)}}}


SO,
{{{S[1]+5(km/hr)=S[2]}}}
But, {{{S[2]=12km/0.20hr=60(km/hr)}}}
Substitute,
{{{S[1]+5=60}}} ---> {{{S[1]=60-5}}}
{{{highlight(S[1]=55(km/hr))}}}, Answer


Thank you,
Jojo</pre>