What is the least number of square tiles required o pave the floor of a room 15 m 17 cm long and 9 m 2 cm broad ?
Length of largest tile = H.C.F. of 1517 cm and 902 cm. = 41 cm.
Area of each tile = (41 x 41) `cm^2`
`:.` Required number of tiles =` ((1517 xx 902)/(41 xx 41))` = 814
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