Hey there, I am usually never stuck with questions like this (sorry for the low difficulty I know it is kind of dumb

)

Here it is:

The distance travelled (s) by a particle varies partly with time and partly with the square of time. If it travels 142.5 m in 3 seconds and travels 262.5 m in 5 seconds, find:

**a**) how far it would travel in 6 seconds

**b**) how far it would travel during the sixth second.

I managed to do question

**a** through part variation formula, but I don't understand the difference between question

**a** and

**b**. I checked the answer key and there were different answers for

**a** and

**b**Thank you much appreciated