Question 34956
Agisnt the wind -->x-12
With the wind -->x+12
Total distance with both wind types -->100 miles
Equation:
{{{100/(x-12)-100/(x+12)=1}}} cross mutliply:
100[(x+12)-(x-12)]=(x-12)(x+12)
100(24)=x^2-144
2400+144=x^2
x=50
Hencer, the speed of the chopper is 50mph.
Paul.