Question

The sun's light takes 180 seconds to reach the planet Mercury.

Which of the following is the correct step to find the distance, in miles, of Mercury from the sun?

Multiply the speed of light through space in miles per second by 180
Divide the speed of light through space in miles per second by 180
Multiply 180 by the speed at which Mercury moves around the sun
Divide 180 by the speed at which Mercury moves around the sun

Answer 1

as distance =speed ×time


therefore ,(the speed of light through space in miles per sec.)×180

Answer 2

Multiply the speed of light through space in miles per second by 180

Step-by-step explanation:

The equation of speed is
`c=(x)/(t)`, where

c: speed of light

x:distance travelled by light

t: time taken by the speed of light to travel the distance x

As c is given in m/s, you first have to transform it into mi/s and then you can find the distance to reach Mercury using the formula below as follows:

`c=(x)/(t) ->x=c*t->x=c*180`