Light travels about 180 million kilometers in 10 minutes. How far does it travel in one minute? How far does it travel in one se
2 answers:
Answer:
The light travels distance in 1 minute=18 million kilometers
The light travels distance in 1 second=0.3 million kilometers
Step-by-step explanation:
We are given that
Light travels total distance in 10 minutes=180 million kilometers
We have to find the distance travels by light in 1 minute and in 1 seconds.
By unitary method
Distance travel by light in 1 min=million kilometers=18 million kilometers
Distance travel by light in 1 min=18 million kilometers
We know that 1 minute=60 seconds
In 60 seconds, light travels distance =18 million kilometers
In 1 second, light travels distance = million kilometers
Hence, the light travels distance in 1 minute=18 million kilometers
The light travels distance in 1 second=0.3 million kilometers
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Answer:
We can write 360 distinct passwords using the numbers 1, 2, 3, 4, 5, and 6.
Step-by-step explanation:
We have to find how many passwords with 4 different digits can we write with the numbers 1, 2, 3, 4, 5, and 6.
Firstly, it must be known here that to calculate the above situation we have to use Permutation and not combination because here the order of the numbers in a password matter.
Since we are given six numbers (1, 2, 3, 4, 5, and 6) and have to make 4 different digits passwords.
- Now, for first digit of the password, we have 6 possibilities (numbers from 1 to 6).
- Similarly, for second digit of the password, we have 5 possibilities (because one number from 1 to 6 has been used above and it can't be repeated).
- Similarly, for the third digit of the password, we have 4 possibilities (because two numbers from 1 to 6 have been used above and they can't be repeated).
- Similarly, for the fourth digit of the password, we have 3 possibilities (because three numbers from 1 to 6 have been used above and they can't be repeated).
So, the number of passwords with 4 different digits we can write = = 360 possibilities.
Hence, we can write 360 distinct passwords using the numbers 1, 2, 3, 4, 5, and 6.