During an experiment, a signal from spaceship reached the ground station in five minute. What was the distance of the speceship from the ground station ? The signal travels at the speed of light, that is,` 3 xx 10^(8) ms ^(-1).`

Explanation

Time = 5 minute
`= 5 xx 60s = 300s `
Speed `= ("Distance")/("Time") `
`therefore` distance = speed `xx` time
`= 3 xx 10 ^(8) xx 300`
`= 900 xx 10 &(8)`
`= 9 xx 100 xx 10 ^(8)`
`= 9 xx 10 ^(10),`
The distance of the spaceship from the ground is `9 xx 10 ^(10) m (or 9 xx 10 ^(7) km).`