Square room

What is the size of the smallest square room, which can pave with tiles with dimensions 55 cm and 45 cm?

How many such tiles is needed?

Correct result:

a =  495 cm
n =  99


x=55 cm y=45 cm  55=511 45=325 LCM(55,45)=32511=495  a=LCM(x,y)=LCM(55,45)=495 cm
n=a2/(x y)=4952/(55 45)=99

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