CTET Class I to V 2012 Nov Paper

Question : 33 of 150

Marks: +1, -0

Floor of a square room of side 10 metres is to be completely covered with square tiles, each having length 50 centimetres. The smallest number of tiles needed is

Validate

Solution:

Side of square = 10 m = 1000 cm
Area of square = 1000 × 1000 cm²
∴ Number of tiles =

{1000 ×1000}/{50 ×50}

= 400.

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