Question

The number of paving stones, each measuring $10\text{dm}$ by $9\text{dm}$ required to have a rectangular veranda $60$ m by $6$ m is _______ .

• A. $360$
• B. $400$
• C. $350$
• D. $300$

Answer 1

The correct option is B $400$

Length of Veranda $=(60\times 10)=600\text{dm}$

Breadth of Veranda $=(6\times 10)=60\text{dm}$

Area of Veranda $=(600\times 60)=36000{\text{dm}}^2$

Area of stone $=(10\times 9)=90{\text{dm}}^2$

Therefore, required number of stone $=\frac{3600}{90}=400$

So, option B is correct.