Thank you for your help!!!!welcome!!!

drlucky

An ds from Kplan：:
What's the volume, in cubic feet, of a rectangular room that has length x feet,width y feet, height z feet?
1) x=1200/(y*z)
2) the area of the ceiling of the room is 120 square feet and the area of each of two facing walls of the room is 100 square feet.
2）中是指任何两个对应面，还是指一个对应面呢？
谢谢指教！！！
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lisaislisa

'each of two facing walls '
welcome ^^

lisaislisa

I assume it means the former
since if it means the latter , it would not emphasize 'each'
so for 2)
xy=120
yz=100
xy=100
we can get xyz , sufficient .
therefore choose D , is that so ?

HaPPy NeW yEAr ! ^^