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The distance may be obtained from the formula distance = speed * time. The speed of light is given and the time is also given. The only thing we have to take into account is that the laser beam flew the distance from Earth to the Moon twice: there...

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Hello!

The distance may be obtained from the formula distance = speed * time. The speed of light is given and the time is also given. The only thing we have to take into account is that the laser beam flew the distance from Earth to the Moon twice: there and back.

So the distance between the astronomers and the Moon was about `1/2 * 3.00*10^8 * 2.52= 3.78*10^8(m), ` or `3.78*10^5` km.