it takes a skier 30 seconds to ski down the 1st mountain to the second mountain that is 40 feet above ground. it takes the skier 6 seconds per foot to slide down. how many feet above ground is the 1st mountain?
To determine the height of the 1st mountain, we can use the time it takes to ski down and the time it takes to slide down one foot.
Let's start by calculating the time it takes for the skier to slide down one foot:
- The skier takes 6 seconds per foot to slide down.
Now, let's find the total time it takes for the skier to ski down the 1st mountain to the second mountain:
- The skier takes 30 seconds to ski down from the 1st mountain to the second mountain.
To find the height of the 1st mountain, we need to divide the total time taken to ski down by the time taken to slide down one foot:
- 30 seconds / 6 seconds/foot = 5 feet.
Therefore, the 1st mountain is 5 feet above the ground.