Question 559514
Let {{{ t }}} = time in hours
In dry conditions,
{{{ d = 75*t }}} km
{{{ 20 }}} minutes x {{{ 1/60 }}} hours/minutes = {{{ 1/3 }}} hr
{{{ d = 75*(1/3) }}}
{{{ d = 25 }}} km
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In wet conditions:
{{{ d = 50*t }}}
{{{25 = 50*t }}}
{{{ t = 1/2 }}} hrs
It will take him a half hour to reach home