High school basketball foul line length?

<img src="https://lambangdaihoc.vip/wp-content/uploads/2020/12/lam-bang-cap-3-tai-lang-son-gia-re-uy-tin-chat-luong.jpg"; style="max-width:430px;float:left;padding:10px 10px 10px 0px;border:0px;" alt="" /><a href="https://nhanlambangcap24h.com/">https://nhanlambangcap24h.com/</a>; 15ft clowns