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What is the least number of square tiles required to pave the floor of a room 15 m 17 cm long and 9 m 2 cm broad?
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- 840
- 841
- 820
- 814
Correct Option: D
Length of the floor = 15 m 17 cm = 1517 cm
Breadth of the floor = 9m 2 cm = 902 cm.
Area of the floor = 1517 × 902 cm2
The number of square tiles will be least, when the size of each tile is maximum.
∴ Size of each tile = HCF of 1517 and 902 = 41
| ∴ Required number of tiles = | = 814 | 41 × 41 |
