A) 360
B) 400
C) 350
D) 300
Correct Answer: B
Solution :
Area of each paving stone \[=(10\times 9)\text{ }d{{m}^{2}}\text{ }=\text{ }90\text{ }d{{m}^{2}}\] Now, length of veranda = 60 m = 600 dm Breadth of veranda = 6 m = 60 dm \[\therefore \]Area of veranda \[\text{= (600 }\!\!\times\!\!\text{ 60) d}{{\text{m}}^{\text{2}}}\] \[\text{=36000 d}{{\text{m}}^{\text{2}}}\] \[\therefore \] Required number of paving stones \[=\frac{36000}{90}=400\]
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