Answer :
Answer:
Hey There!
Let's solve...
Here it is a rectangular floor with length =21 cm and width =15cm
So
[tex]area = l \times w \\ = 21 \times 15 \\ = 315 {ft}^{2} \\ \\ [/tex]
So now We need to convert it to yards square
[tex]315ft^{2} \times \frac{ {1yd}^{2} }{ {9ft}^{2} } \\ \\ = \cancel{315ft^{2}} \: ^{35} \times \frac{ {1yd}^{2} }{ \cancel{9 {ft}^{2} }} \\ \\ = 35 {yd}^{2} [/tex]
So how this 9 ft^2 came??
Let's know
[tex]ft \to \: yards \\ \\ 3ft = 1yd \\ \\ {3ft}^{2} = {1yd}^{2} \\ \\ \boxed{ {9ft}^{2} = {1yd}^{2}} [/tex]