Convert 150 miles to inches and divide by 15*10^6 (15 million).
1 mile = 63,360 inches.
Reno, Nevada and Salt Lake City, Utah are about 400 miles apart today. Yet 15 million years ago they were only 250 miles apart. The continental crust is being stretched by plate tectonic forces. How many inches per year do the two cities move away from each other?
2 answers
• 1 mile=5280 feet
• 1 foot=12 inches
• 5280 X 12 = 63,360 inches in 1 mile
• 400 x 63,360 = 25,344,000 inches in 400 miles (this is how many inches SLC and Reno are apart today.
• 250 x 63,360 = 15,840,000 inches in 250 miles (this is how many inches SLC and Reno were apart 15,000,000 years ago.
• 25,344,000 – 15,840,000 = 9,504,000 inches (this is the difference in inches from current day and 15,000,000 years ago of the location of the two cities).
• 9,504,000/15,000,000 = approximately .6336 inches per year!
• 1 foot=12 inches
• 5280 X 12 = 63,360 inches in 1 mile
• 400 x 63,360 = 25,344,000 inches in 400 miles (this is how many inches SLC and Reno are apart today.
• 250 x 63,360 = 15,840,000 inches in 250 miles (this is how many inches SLC and Reno were apart 15,000,000 years ago.
• 25,344,000 – 15,840,000 = 9,504,000 inches (this is the difference in inches from current day and 15,000,000 years ago of the location of the two cities).
• 9,504,000/15,000,000 = approximately .6336 inches per year!
1 answer