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Question

The light from the sun takes $$500  s$$ to reach the earth. Assuming that the speed of light is $$3,00,000 {km}/{s}$$, calculate the distance between the sun and the earth.


A
100 million km
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B
150 million km
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C
200 million km
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D
300 million km
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Solution

The correct option is C 150 million km
Step 1
$$Speed = \displaystyle\frac{Distance}{Time}$$

Step 2
$$3,00,000 = \displaystyle\frac{Distance}{500}$$

Step 3
Distance $$= 500 \times 3,00,000$$
               $$= 15,00,00,000   km$$
               $$= 150\ million\ km$$

Physics

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