Answer :
Answer:
Step-by-step explanation:
distance divided by rate = time
given:
8 / ( 20 + w) = 6 / (20-w) where w is wind speed
Cross multiply
160 - 8w = 120 + 6w
40 = 14 w
w = 40 / 14 m/hr = 2.857 mph
Answer:
Step-by-step explanation:
distance divided by rate = time
given:
8 / ( 20 + w) = 6 / (20-w) where w is wind speed
Cross multiply
160 - 8w = 120 + 6w
40 = 14 w
w = 40 / 14 m/hr = 2.857 mph