Question

a rectangular Courtyard is 18m 72cm long and 13m 20cm broad it is to be paved with square tiles of the same size find the least possible number of such tiles​

Answer 1

Length of courtyard = 1872 cm

Breadth = 1320 cm

Prime factors of these two values

1872 = 2×2×2×2×3×3×13

1320 = 2×2×2×3×5×11

HCF = 24

So side of square = 24 cm

Number of tiles = 1872×1320/24×24

= 4290