Final answer:
To circle the planet by boat, the total distance is approximately 24,935.86 miles.
Step-by-step explanation:
To find out how many miles it is to circle the planet by boat, we need to calculate the circumference of the Earth. Given that the circumference of the Earth at the equator is 2.5 x 10^4 miles, we can use this value to find the total distance. The formula for the circumference of a circle is C = πd, where C is the circumference and d is the diameter.
Since we are given the circumference, we can solve for the diameter. We know that the diameter is twice the radius, which is the distance from the center of the Earth to the equator. Therefore, the diameter is equal to 2 times the radius, or 2 * (2.5 x 10^4 miles / 2π).
Using this formula, the diameter is approximately 7,955.77 miles. To find the total distance to circle the planet by boat, we multiply the diameter by π (pi), yielding a value of approximately 24,935.86 miles.