b.
A rectangular hall is 20 m 16 cm long and 15 m 60 cm wide. It is to be decorated with square
tiles of the same size. Find the least possible number of tiles.
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Answer:
20m16cm = 2016 cm
15m60cm=1560cm
HCF=
2016=2×2×2×2××2×3×3×7
1560=2×2×2×3×5×13
HCF=24
Least possible numbers of tiles=
area of rectangular÷area of swuare tiles
=(2016×1560)÷(24)²
=5460
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