Answer:
Len = 15
Step-by-step explanation:
base = √25²-20²
= √625-400
= √225
= 15
First you subtract 1/3 from both sides, that leaves you with 5/12, then you multiply the reciprocal of 1/2 by both sides, which is 2, which gives you 5/6. Therefore, K>5/6
The answer to your question is C