Question 327378
Rate*Time=Distance
.
.
.
Let D be the driving rate, W the walking rate,
{{{D*(9t)=90}}}
1.{{{D*t=10}}}
2.{{{W*t=5}}}
.
.
{{{t+9t=3}}}
{{{10t=3}}}
3.{{{t=0.3}}}
From eq. 1,
{{{D=10/0.3=33.3}}}mph
From eq. 2,
{{{W=5/0.3=16.7}}} mph
That's a pretty fast walking rate.