Question 310605
Brenda's rate is B.
Rate*Time=Distance
{{{B*4=D1}}}
{{{2.5*4=D2=10}}}
{{{D1+D2=22}}}
{{{4B+10=22}}}
{{{4B=12}}}
{{{B=3}}}
Brenda's rate is 3 km/hr.