Question

compare the diameter of the sun 1.4×10^9 m to diameter of the earth 1.2756×10^7m

Answer 1

Given that Diameter of the Sun is 1.4 x 109 meters and Earth is 1.2768 x 107 meters.

Ratio of diameters of the sun to that of earth is = 1.4 x 109 : 1.2768 x 107 

= 1.4 x 102 : 1.2768

= 140 : 1.2768.

= 70 : 0.6384

= 35 : 0.3192    (multiply 10000 each term)

= 350000 : 3192

= 175000 : 1596

= 87500 : 798

= 43750 : 399.

Hope This Helps :)

Answer 2

This is a simple question based on the basic concepts of multiplication,division and some of the rules of exponents.

So, what I did here was we just need to divide the sun's diameter by the earth's diameter. After doing so we will get that the diameter of the sun is nearly hundred times the diameter of the earth.

You should keep in mind that the answer we get in these type of questions are approximate. Even in the question, the word 'nearly' is given.