Question

The number of paving stones, each measuring 10 dm by 9 dm required to pave a rectangular veranda 60 m by 6 m is _________.

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

Answer 1

Answer: (B)

$400$

Area of each paving stone
= $(10\times 9)d{m}^2=90d{m}^2$
Now, length of veranda = 60 m = 600 dm
Breadth of veranda = 6 m = 60 dm
$\therefore$ Area of veranda = $(600\times 60)d{m}^2$
= $36000d{m}^2$
$\therefore$ Required number of paving stones = $\frac{36000}{90}=400$