Question: here is a measury theory question with answer, I am quite new to this, I still can't comrpehend what the answer means. Please help explain

here is a measury theory question with answer, I am quite new to this, I still can't comrpehend what the answer means. Please help explain with more details, a drawing will be much appreciated. thanks

Step by Step Solution
There are 3 Steps involved in it
Get step-by-step solutions from verified subject matter experts
