Question

The paint in a certain container is sufficient to paint an area equal to 9.375 m2. How many bricks of dimensions 22.5 cm×10 cm×7.5 cm can be painted out of this container? Solution:

Answer 1

$\sf\red{Given} \begin{cases} \sf\green{Container\:area- 9.375\:m^2} \\ \sf\green{Dimension\:of\: brick - 22.5 \times 10 \times 7.5cm} \end{cases}$

F O R M U L A :

${\boxed{\tt{ Total\: surface\: area - 2(lb+bh+hl)}}}$

Total surface area of One Brick -

$\mapsto\tt{ 2(lb+bh+hl)} \\ \mapsto\tt{[2(22.5 \times 10+10 \times 7.5+22.5 \times 7.5)]} \\ \\ \mapsto\tt{2(225+75+168.75)} \\ \\ \mapsto\tt{(2 \times 468.75) \: cm^2} \\ \\ \mapsto\tt{937.5 \: cm^2 }$

According to Question,

Let the bricks be painted out of paint container be x .

Area of n bricks = ( n × 937.5 ) cm²

$\longrightarrow\tt{937.5n\:cm^2}$

Again,

Area that can be painted by the paint of the container = 9.375 m²

$\longrightarrow\tt{93750\: cm^2}$

So,

We have, 93750 = 937.5n [ n = 100 ]

Therefore, 100 bricks can be painted out by the paint of the container.

Answer 2

Answer:

main fir bol rha hoon

main hoon GIAN  

Step-by-step explanation: