Find the minimum number of square tiles required to pave the floor of a room of 2m 50cm long and 1m

Find the minimum number of square tiles required to pave the floor of a room of 2m 50cm long and 1m 50cm broad ?

  1. 50
  2. 750
  3. 45
  4. 15
  5. None of these

Ans: 4

Sol: HCF of 250 cm and 150 cm is 50 cm, which is the side of the tile

So, the required number of tiles  =  (250 X 150) / (50X50)  =  15

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