How Many tiles whose length and breadth are 12 CM respectively Will be needed to cover a rectangular region whose length and breadth are respectively:
(i) 70cm and 36 CM
(ii) 144cm and 1 CM
Answers
Answer:
Step-by-step explanation:
(a) Area of rectangular region = 100 × 144
= 14400 cm
Also, area of one tile = 5 × 12
= 60 cm2
The number of tiles needed = Area of the rectangular region / Area of one tile
= 14400 / 60
= 240
Hence, 240 tiles are needed in this case.
(b) Now, area of rectangular region = 70 × 36
= 2520 cm2
Also, area of one tile = 5 × 12
= 60 cm2
The number of tiles needed = Area of the rectangular region / Area of one tile
= 2520 / 60
= 42
Hence, 42 tiles are needed in this case.
Therefore, 240 tiles are required in 1st case and 42 tiles are required in 2nd case.
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Answer:
☆ 18 tiles
Step-by-step explanation:
i) Length of the rectangular region = 70 cm
Breadth of the rectanguler region = 36 cm
Area = l × b
= 70 × 36
= 2520 cm²
Side of tile = 12 cm
Area = side × side
= 12 × 12
= 144 cm ²
No. of tiles needed = 2520 ÷ 1 44
= 17.5
= 18 (approx.)