Question

1 astronomical unit is equal to:

• A. $2.475\times {10}^{14}km$
• B. $1.496\times {10}^{14}km$
• C. $2.475\times {10}^{11}km$
• D. $1.496\times {10}^{11}km$

Answer 1

Answer: (D)

1. The astronomical unit(AU) is the unit for measuring ​larger distances.
2. It is the mean distance of the centre of the Sun to the centre of the earth.
3. The distance between the sun and the earth is $1.496\times {10}^{11}m$ .
4. Therefore, 1 AU = $1.496\times {10}^{11}m$ .

Hence,

Option D)$1.496\times {10}^{11}m$ is the correct option.