A rectangular floor is completely tiled by 9 square tiles. Length of each tile is 180 cm. What can be the dimensions of the rectangular floor?
A.360 × 1250
B.180 × 1620✓ Correct
C.450 × 720
D.300 × 900
Explanation
Each tile is 180×180 cm. With 9 tiles, total area = 9 × 180² = 291600 cm². 180 × 1620 = 291600, and width 180 = 1 tile × 180 cm, length 1620 = 9 tiles × 180 cm.
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