[MRM]

I got 525 also. Usually Fint and I getting the same sum would mean that he made a mistake along the way, I think he is right here. The length of the thigh bone length is irrelevant and is meant to distract your attention. The ratio of footprint length to body length is 40 to 700. If you divide 700 by 40 you get 17.5, meaning the body length is 17.5 time the foot length. So 17.5 time the new length of 30 equals 525.

There’s an even shorter solution that confirms that 525 is correct. The new footprint size of 30 is exactly 3/4 or 75% of the original footprint size of 40. So, the new body length is exactly 3/4 of the length of the original size. .75 times the original length of 700 equals 525.

Crusty is also correct. 35/2 equals 17.5.