What is the minimum number of identical square tiles required to tile a floor of length 6 m 24 cm and width 4 m 80 cm ?
Options:
A . 122
B . 130
C . 148
D . 165
E . None of these
Answer: Option B Length of largest tile = H.C.F. of 624 and 480 cm = 48 cm Area of each tile = (48 × 48) cm2 ∴ Required number of tiles : $$\eqalign{ & = \left( {\frac{{624 \times 480}}{{48 \times 48}}} \right) \cr & = 130 \cr} $$
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