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 x 10 cm x 7.5 cm can be painted out of this container?

Answer 1

Answer:

100 bricks

Step-by-step explanation:

given dimensions of bricks: l = 22.5 cm

                                              b = 10 cm

                                              h = 7.5 cm

∴ total surface area of one brick = 2(lb+bh+hl)

                                                 = $2\left ( 22.5\times 10+10\times 7.5+7.5\times 22.5 \right )$

                                                = $937.5 cm^{2}$

now given area of paint in a container = $9.375m^{2}$

                                                                = $9.375 \left ( 100 cm \right )^{2}$

                                                                = $9.375\times 10^{4} cm^{2}$

∴ Number of bricks which can be painted = $\frac{total area of paint in a container }{area of one brick}$

                                                                  =$\frac{9.375\times 10^{4} cm^{2}}{937.5 cm^{2}}$

                                                                  = 100

Answer 2

Answer:

hope it helps ☺️☺️☺️......