Question 390286
Assume the distances the airplane travalled for two trips are the same:
{{{5*(V+35)=7*(v-35)}}}
{{{5V + 5*35 = 7V - 7*35}}}
{{{12*35 = 2V}}}
{{{V = 6*35}}}
{{{V = 210}}}
V = 210 mi/h