If you could travel with speed of light (3.0E5 km/s) it would take only 1.3 seconds to reach Moon. How far is Moon from Earth?

3.9 E5 km

To find out the distance between the Earth and the Moon, we can use the formula for speed:

speed = distance / time

Since we know the speed of light is approximately 3.0E5 km/s and it would take approximately 1.3 seconds to reach the Moon, we can plug these values into the equation:

3.0E5 km/s = distance / 1.3 s

To find the distance, we can rearrange the equation to solve for distance:

distance = speed * time

distance = 3.0E5 km/s * 1.3 s

Calculating this equation will give us the distance:

distance ≈ 3.9E5 km

Therefore, the Moon is approximately 390,000 kilometers away from Earth.