GRE数学题帮忙翻译解答一下呀谢啦
Arectangularpoolofuniformdepthisbeingfilledwithwaterataconstantrateof200cubicfeetmerminute,andthewaterlevelinthepoolisrisingatarateof3/4footperhour
Theareaofthebottomofthepool9000sqft
answer:A