Question

Light takes approximately 8 minute to reach the earth from Sun. The distance between earth and Sun in kilometers is ..............................

• A. $144\times {10}^5$
• B. $182\times {10}^6$
• C. $144\times {10}^6$
• D. $182\times {10}^5$

Answer 1

The correct option is C $144\times {10}^6$

Light takes approximately 8 minutes to reach the earth from Sun.

We know that the speed of light is $3\times {10}^{8}m/s$.

So, distance covered= speed$\times$time

$d=3\times {10}^8\times 8\times 60m$

$d=24\times 60\times {10}^{8}m$

$\Rightarrow 144\times {10}^{6}km$

The distance between earth and Sun in kilometers is $144\times {10}^{6}km$