Question

How many paving stones each measuring $2.5\text{m}$ $\times 2\text{m}$ are required to pave a rectangular courtyard $30\text{m}$ long and $16.5\text{m}$ wide?

• A. $105$
• B. $89$
• C. $99$
• D. $84$

Answer 1

The correct option is C $99$

Area of paving stones $=2.5\times 2=5{\text{m}}^2$

Area of courtyard $=30\times 16.5=495{\text{m}}^2$

Now,

Number of paving stones required $=$ area of courtyard $÷$ area of paving stone

$=495÷5$

$=99$ paving stones

So option C is the correct answer.