Question 939695
{{{ 10*10 = 100 }}}
{{{ 20*12 = 240 }}}
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Time to mow the lawns will be
proportional to their areas
{{{ 100 / 1 = 240/t }}}
{{{ 100t = 240 }}}
{{{ t = 2.4 }}}
{{{ .4*60 = 24 }}}
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It will take 2 hrs 24 min