Flooring a room

Find the cost of flooring a room 6.5 m by 5 m with square tiles of sides 25 cm at the rate of rupees 9.40 per tile.

Correct answer:

x =  4888 Rp

Step-by-step explanation:

$$\begin{gathered} a=6.5\text{ m } \\ b=5\text{ m } \\ {S}_1=a\cdot b=6.5\cdot 5={\displaystyle \frac{65}{2}}=32.5{\text{m}}^2 \\ c=25\text{ cm}\to \text{ m}=25\mathrm{/}100\text{ m}=0.25\text{ m } \\ {S}_2=c^2=0.25^2={\displaystyle \frac{1}{16}}=0.0625{\text{m}}^2 \\ n=S_1\mathrm{/}{S}_2=32.5\mathrm{/}0.0625=520 \\ x=9.40\cdot n=9.40\cdot 520=4888\text{ Rp} \end{gathered}$$

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