Question

A door of length 4m and breadth 2m is fitted in the wall. The length and breath at the
respectively. If the cost of whitewashing the wall is 4400 find the rate of whitewashing.​

Answer 1

Answer:

The cost of white washing is Rs284.

Step-by-step explanation:

Since we have given that

Length of wall = 4.5 m

Breadth of wall = 3.6 m

So, Area of wall is given by

\begin{lgathered}Area=Length\times breadth\\\\Area=4.5\times 3.6\\\\Area=16.2\ m^2\end{lgathered}

Area=Length×breadth

Area=4.5×3.6

Area=16.2 m

2

Length of door = 1 m

Breadth of door = 2 m

So, Area of door is given by

\begin{lgathered}Area=Length\times Breadth\\\\Area=1\times 2\\\\Area=2\ m^2\end{lgathered}

Area=Length×Breadth

Area=1×2

Area=2 m

2

Area of white washing the wall excluding the door = Area of wall - Area of door is given by

\begin{lgathered}16.2-2\\\\=14.2\ m^2\end{lgathered}

16.2−2

=14.2 m

2

Cost of per sq. m = Rs. 20

Total cost of white washing the wall is given by

\begin{lgathered}20\times 14.2\\\\=Rs.284\end{lgathered}

20×14.2

=Rs.284

Hence, the cost of white washing is Rs. 284.