Problema Solution
It took Cindy 2h to bike from Abbott to Benson at a constant speed. The return trip took only 1.5 h because she increased her speed by 6 km/h. How far apart are Abbott and Benson?
Answer provided by our tutors
Let v be the constant speed when Cindy trabels from Abbott to Benson.
Let S be the distance between Abbott and Benson.
The return trip speed =(v+6).
2v+(1.5(v+6)=2S.
2v=1.5*(v+6).
2v=1.5v+9.
0.5v=9.
v=18 km/h.
2S=2*18+1.5(18+6).
=36+36.
S=72/2
=36 km.