Question 188548
Let {{{b}}}= Jill's speed
For Jack:
{{{d[a] = r[a]*t[a]}}}
For Jill:
{{{d[b] = r[b]*t[b]}}}
given:
{{{t[a] = 2}}} hr
{{{r[a] = 53}}} km/hr
{{{t[b] = 3}}} hr
{{{d[a] = d[b] - 26}}} km
----------------------
Rewriting equations:
(1) {{{d[b] - 26 = 53*2}}}
(1) {{{d[b] = 106 + 26}}}
(1) {{{d[b] = 132}}}
(2) {{{d[b] = r[b]*3}}}
(2) {{{132 = 3*r[b]}}}
(2) {{{r[b] = 132/3}}}
(2) {{{r[b] = 44}}} km/hr answer