Question 1082369
{{{3*r*15=350}}}


{{{r=350/(3*15)}}}

{{{r=(5*7*2*5)/(3*3*5)}}}

{{{r=70/9}}}


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{{{2*r*t=700}}}


{{{2*(70/9)t=700}}}


{{{t=700(9/70)(1/2)}}}


{{{t=10*9/2}}}


{{{highlight(t=45)}}}