Answer:
Given, length of a tile = 12 cm and breadth of a tile = 5 cm \[\therefore \]Area of one tile = Length x Breadth =12 cm \[\times \] 5 cm = 60 sq cm Here, length of the rectangular region = 100 cm and breadth of the rectangular region = 144 cm \[\therefore \]Area of the rectangular region = Length \[\times \] Breadth \[=100cm\times 144cm=14400sqcm\] Now, number of required tiles \[=\frac{\text{Area of the rectangular region}}{\text{Area of the one tile}}\] \[\text{=}\frac{14400}{60}=240\] Hence, the number of required tiles is 240. (b) Given, length of the rectangular region = 70 cm and breadth of the rectangular region = 36 cm \[\therefore \]Area of the rectangular region = Length x Breadth \[=70cm\times 36cm=2520sqcm\] Now, number of the required tiles \[\text{=}\frac{\text{Area of the rectangular region}}{\text{Area of the one tile}}\] \[\text{=}\frac{2520}{60}=42\] Hence, the number of the required tiles is 42.
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