Question

Find the number of marbals slabs of size 20cm ×30cm required to pave the floor of a square room of side 3 m

Answer 1

Answer:

150

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Answer 2

Area of marble slabs = Length × Breadth

= 20 × 30

= 600 cm²

Side of square room = 3m = 300cm

Area of square room = side × side

= 300cm × 300cm

= 90000cm²

$no. \: of \: marble \: slabs \: = \frac{area \: of \: room}{area \: of \: marble \: slabs} \\ = \frac{90000}{600} = 150 \: marbles$