Question

harish runs faster than suresh in a given length. To compare the fastness of harish and suresh the physical quantities involved are
1. length only
2. Time only
3. Length and time
4. Neither length nor time ​

Answer 1

According to my thinking

3.Length and time

Because, speed is depended on the distance and the time which are fundamental quantities.

And speed is one of the derived quantities.

I hope you are able to understand what I mean.

Have a super day.