Question 702780
Let {{{ t }}} = the total time for the trip
{{{ t = d/r }}}
given: {{{ d = 2 }}} mi
{{{ t = 2/r }}}
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The rate of the current is {{{ 2 }}} mi/hr
Equation for going upstream:
{{{ t[1] = 2/( r - 2 ) }}}
Equation for going downstream:
{{{ t[2] = 2/( r + 2 ) }}}
{{{ t = t[1] + t[2] }}}
{{{ t = 2/( r-2 ) + 2/( r+2 ) }}}
{{{ t = 2*( 1/( r-2) + 1/( r+2 )) }}}