M.

how much time has elapsed between clock a and clock b

First let's find out how many hours it's been:

12:10, 1:10, 2:10, 3:10, 4:10, 5:10, 6:10

It's been 7 hours and how many minutes?

56-10=46

The answer is 7 hours and 46 minutes

Hopefully this helps! If you have any more questions or don't understand, please comment or DM me, and I'll get back to you ASAP. :)

11:10
6:56
It takes 46 min to get from 11:10 to 11:56
now find for the hours
it takes 7 hours to get from 11:56 to 6:56
So the time elapse between the clocks is 7hours and 46 min

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