Which trail is the closest in length to 10.5 kilometers?

How can (square root of 25) ^2 be rewritten?

I’m really confused and need your assist me with this question i’ve never been taught

Alayna wonders how much water it would take to fill her cup she drops her pencil in her cup and notices that it just fits diagonal the pencil is 17 cm long and the cup is 15 cm tall how much water can the cup hold