Question
A plane makes a 240-mile trip against a head wind in 1 hour and 30 minutes and returns, with a tail wind of the same speed, in 1 hour. What is the speed of the wind?
A) 80 mph
B) 200 mph
C) 40 mph
D) 160 mph
A) 80 mph
B) 200 mph
C) 40 mph
D) 160 mph
Answers
scott
p - w = 240 / 1.5
p + w = 240 / 1
adding equations ... 2 p = 400
solve for p , then substitute back to find w
p + w = 240 / 1
adding equations ... 2 p = 400
solve for p , then substitute back to find w
antonia frans
1 hour = 60 minutes 240 + 30 m+ 1 hour = 330 is the speed