Q.16. A lenth measures 10Cm X 10Cm. How many such lenth are required to cover a wall of
4m x 2.5m.
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Answer:
Length of room =20cm
Breadth of room =10cm
The HCF of 20cm and 10cm will be size of square tiles HCF of 20 and 10=10cm
Area of room = 20×10=200cm
2
Area of 1 tile = 10×10=100cm
2
Number of tiles =
100
200
=2
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