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A 50 scale is used to make measurements on a construction plan. If a plan is said to be in 50 scale, then a length of one inch on the ruler is the equivalent of 50 feet on the plan.
In those countries that use the long scale (based on powers of a million) like Europe:25 trillion = 25 x (106)3= 25 x 1018= 25,000,000,000,000,000,000In those countries that use the short scale (based on powers of a thousand plus one) like USA:25 trillion = 25 x (103)3+1= 25 x 1012= 25,000,000,000,000
1 inch to 1 mile is 1:63360 so 1 inch to 25 miles is 1:1,584,000
On the Imperial Scale Rule ; it is divided into 12 inches, which is 1 foot.
The answer depends on whether you're using the U.S. or British billion.The U.S. billion is a thousand millions, so 25 billion is 25,000 millions.The British billion is a million millions, so 25 billion is 25,000,000 millions.The answer depends upon where you are:In those countries that use the long scale (based on powers of a million), like Europe:1 billion = 1 million million = 1,000,000 million → 25 billion = 25,000,000 million (25 million million)In those countries that use the short scale (based on powers of a thousand plus one), like USA:1 billion = 1 thousand million = 1,000 million → 25 billion = 25,000 million (25 thousand million).