That’s why I said “approx”. But you can still get the answer this way.
To go one step further, you can approximate that the length of the entire belt wrapped around the pulleys is 5 of those lines of length “8”, which is a total of 40.
If you use a calculator to convert the answers into numbers, the answers look like this:
A) 31
B) 37
C) 61
D) 65
E) 67
The answer is clearly B, without any complicated Math.
You can either spend 5 mins trying to do real Math and prob still get it wrong, or spend 1 min appoximating, checking the answers and prob get it right.
Also, if you’re struggling to explain the solution without a diagram, then the problem is not as easy as you imply.
For 90% of the country, this problem is pretty hard using straight Math. But I’m sure most can approximate.