question_answer

How many tiles \[40\text{ }cm\times 40\text{ }cm\] each will be required to pave a footpath\[~1\text{ }m\] wide carried round the outside of a plot \[1800\text{ }cm\times 28\text{ }m\]?

A)  600                

B)  5,2000        

C)  9,900                         

D)  5,250

Correct Answer: A

Solution :

(a): Footpath area \[=2\times (2800+200)\times 100+2\times 1800\times 100=6000\]\[\times 100+3600\times 100=960000\]                         No of tiles \[=\frac{461000}{40\times 100}\]