Question

how many tiles whose length and breadth are 13 cm and 7 cm respectively are needed to cover a rectangular region whose length and breadth are 5 20 cm and 140 CM​

Answer 1

$\huge \bold \red{heya \: friend}$

It is given that

Length of each tile= 13 cm

Breadth= 7 cm

Area of a tile= Length×Breadth

= 13×7

= 91 cm²

Now, area of the rectangular region:

= 520×140

= 72800 cm²

Therefore, Number of tiles= Area of the rectangular region÷Area of one tile

= 72800÷91

= 800 tiles

Answer=> 800 tiles

Answer 2

$\bold\green{Explanation}$

According to the question we have :-

→ Length of tile = 13cm

→ Breadth of tile = 7 cm

→ Rectangular Region = 520 × 140

Simply , by using formula of area of rec. we can find it ,

$\tt\green{Area\:of\: rectangle=length\times breadth}$

Now, according to the question by substituting the known values in formula we get :-

→ Length of tile = 13cm

→ Breadth of tile = 7 cm

$\begin{lgathered}\tt = Area\:of\:tiles=13\times 7\\ \\ \tt\green = Area=91cm\end{lgathered}$

Hence , the Area of region is :-

$\begin{lgathered}\tt = Area\:of\:plot=530\times 140\\ \\ \tt\green= Area\:of\:plot=72800cm{}^{2}\end{lgathered}$

$\sf\orange{\:\: Required\:Tiles=\dfrac{Area\:of\:plot}{Area\:of\:tiles}}$

$\begin{lgathered}\tt = No.\:of\: tiles=\cancel{\dfrac{72800}{91}}\\ \\ \tt\green = No. \:of \: Tiles\: =800\end{lgathered}$

Hence , the required tiles is 800