SOLUTION: Square room with 400 square bricks of 15 cm long..what size is the length if the room?

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Question 915786: Square room with 400 square bricks of 15 cm long..what size is the length if the room?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +s+ = the length of a side of the room
+s%5E2+=+400+ bricks
+s+=+20+ bricks
If the side of each brick is +15+ cm, the
+20%2A15+=+300+ cm is the length of the room
------------------
check:
Each brick is +15%2A15+=+225+ cm2
The area of the room is:
+400%2A225+=+90000+ cm2
and
+300%2A300+=+90000+ cm2
OK