Question

Earth has a surface area of 196 million square miles. What is its area in each unit?

(a) square kilometer
(b) square megameter
(c) square decimeter
(d) None of these

Answer 1

The surface area of Earth is 196 million square miles. It can be converted to 507,640,000 square kilometers, 507.64 square megameters, and 507,640,000,000 square decimeters.

Step-by-step explanation:

The surface area of Earth is given as 196 million square miles. To convert this into different units, we can use the conversion factors:

1. 1 square mile = 2.59 square kilometers
2. 1 square mile = 2.59 x 10-6 square megameters
3. 1 square mile = 2.59 x 106 square decimeters

Using these conversion factors, we can calculate the area of Earth in each unit:

(a) Area in square kilometers = 196 million square miles x 2.59 square kilometers/square mile
= 507,640,000 square kilometers

(b) Area in square megameters = 196 million square miles x 2.59 x 10-6 square megameters/square mile
= 507.64 square megameters

(c) Area in square decimeters = 196 million square miles x 2.59 x 106 square decimeters/square mile
= 507,640,000,000 square decimeters

Therefore, Earth has an area of 507,640,000 square kilometers, 507.64 square megameters, and 507,640,000,000 square decimeters.