A veranda 40 meters long 15 meters broad is to paved with

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A veranda 40 meters long 15 meters broad is to paved with stones each measuring 6 dm by 5 dm. the number of stones required is ?

1. 1000
2. 2000
3. 3000
4. None of these

Correct Option: B

Length = (40 x 10 ) dm = 400 dm.
Breadth = (15 x 10 ) dm = 150 dm.

Area of veranda = (400 x 150 ) dm²
Area of one stone = (6 x 5 ) dm²

∴ Required number of stones = (400 x 150) /(6 x 5) = 2000