Question

plzz tell me this question

Answer 1

Total Area of one brick = 2(22.5×10+10×7.5+7.5×22.5)cm^2
=2(225+75+168.75)
=2(468.75)
=937.5
Area painted by one paint container=9.375m^2
=(9.375×10000)cm^2
=93750cm^2

No. of bricks that can be painted
= 93750/937.5
=100 bricks

Answer 2

area that can be painted by Paint in container = 9.375 m^2.

1m = 100 cm

1m^2 = 100×100 cm^2

9.375 m^2 = 9.375×10000

= 93750 cm^2


Dimensions of each brick = 22.5 × 10 × 7.5

We know that a brick is in form of cuboid.

So, surface area of brick = surface area of cuboid

= 2(lb+bh+hl)

= 2(22.5 × 10 + 10×7.5 +7.5×22.5)

= 2(225+75+ 168.75)

= 2×468.75

= 937.5 cm^2


No of bricks
$= \bf{ \frac{paint \: in \: container}{sa \: \: of \: 1 \: brick} }$


$= \frac{93750}{937.5}$


$= \frac{93750 \times 10}{9375}$


$= \frac{ \cancel{93750} \: \: 10\times 10}{ \cancel{9375}}$


$= \bf{ \boxed{100}}$


$\textbf{So , number of bricks can be painted} \\ \textbf{=100}$