SOLUTION: A helicopter goes 720 miles with the wind in the same time it can go 630 miles against the wind. The speed of the wind is 6 miles per hour. Find the speed of the helicopter with

Question 301797: A helicopter goes 720 miles with the wind in the same time it can go 630 miles against
the wind. The speed of the wind is 6 miles per hour. Find the speed of the helicopter
with no wind.
Found 2 solutions by josmiceli, mananth:
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = speed of helicopter with no wind
= speed of wind
given:
with the wind:

against the wind:

---------------
This is 2 equations with 2 unknowns
solve for and
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
A helicopter goes 720 miles with the wind in the same time it can go 630 miles against the wind. The speed of the wind is 6 miles per hour. Find the speed of the helicopter with no wind.
let the speed if the helicopter in still air be x
aginst wind it will be x-6 mph2
time taken = 630 / x-6
with wind it will be x+6 mph
time taken = 720 / x+6
630 / x-6 = 720 / x+6
630(x+6) = 720(x-6)
630x+3780 = 720x-4320
-90x=-8100
x=-9100/-90
x= 90 mph
Ananth

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