# A community hall is 16m 50cm long and 15m 25cm wide.It is to be paved by square marble stone tiles.Find the largest size of each tile and least number of tiles required.

16 m 50 cm = 1650 cm and 15m 25cm=1525m. The largest size of a marble is HCF of 1650 and 1525

1650 = 2x5x5x33

1525=5x5x61

HCF is 5x5 = 25

So the squre have side = 25 cm. Therefore number of square requared = (1650 x 1525)/(25 x 25) = 66 x 61=4026

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